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Calculated Shard: 51 (from laksa037)

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curl -X POST \
  'http://laksa051.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://groww.in/blog/bollinger-bands\')), getAhrefsUnparsedNoserviceFromURL(\'https://groww.in/blog/bollinger-bands\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/groww.in\/blog\/bollinger-bands","crawl_time":1775805953,"first_indexed_time":1771227567,"http_code":200,"src_unparsed":"in,groww!\/blog\/bollinger-bands s443","src_root_hash":"4039082580173856451","history_drop_reason":null,"meta_title":"How to Use Bollinger Bands in Stock Trading | Groww","meta_descriptions":["Learn how Bollinger Bands work, how to interpret volatility, and how traders use this popular technical indicator for entries, exits, and trend analysis."],"attrs_boilerpipe_text":"Bollinger Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers.\nIn this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies.\nIntroduction to Bollinger Bands\nBollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines:\nA Simple\nMoving Average\n(SMA)\nAn upper band\nA lower band\nThe distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum. \nWho Created Bollinger Bands?\nBollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms. \nHow Bollinger Bands Are Calculated\nThe calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility. \nHere are the steps for the calculation: \nMiddle Band (SMA):\nFor the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average. \nStandard Deviation:\nWork out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility. \nUpper Band:\nAdd the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band. \nLower Band:\nDeduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2. \nComponents of Bollinger Bands\nHere are some of the main components of Bollinger bands. \n➤ Middle Band (Simple Moving Average)\nUsually, a 20-period Simple Moving Average (SMA).\nIt is primarily helpful for establishing a baseline or trend for the indicator. \n➤ Upper and Lower Bands (Standard Deviations)\nPlotted two standard deviations below and above the middle SMA line\nrepresentation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low\nFormula:\nUpper Band = SMA + (2 × Standard Deviation) \nLower Band = SMA - (2 × Standard Deviation)\nHow to Interpret Bollinger Bands\nBollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band: \nWhen the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup.\nWhen price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market. \nWhen the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum. \nTraders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average\ncrossovers\n. \nIn summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable!\nTrading Strategies Using Bollinger Bands\nHere are some of the trading strategies you can deploy with Bollinger bands. \nMean Reversion Strategy\nAssumes price will revert to the middle band after reaching the upper or lower band\nIdeal for\nrange-bound or sideways markets\nEntry:\nBuy near the lower band, sell near the upper band\nStop-loss:\nJust outside the bands\nTake profit:\nNear the middle band (SMA)\nTrend Following Strategy\nEnter trades in the direction of a\nconfirmed breakout\nWorks best in\nstrong trending markets\nEntry:\nOn breakout with volume confirmation\nStop-loss:\nInside the band\nTake profit:\nRide the trend, using trailing stops.\nFor\noptions\n, Bollinger Bands can pair well with strategies like\nstraddles or strangles\n, especially when anticipating volatility expansion. \nCommon Mistakes to Avoid\nHere are some common errors worth avoiding. \nAssuming all breakouts are sustainable\n: Many of them are false without volume confirmation.\nIgnoring trend direction:\nBollinger Bands work best when combined with trend analysis.\nUsing fixed settings for all assets:\nAdjust the moving average period and standard deviation to suit different instruments or timeframes.\nForcing trades in a low-volatility market:\nSometimes, the best trade is no trade.\nCombining Bollinger Bands with Other Indicators\nTo improve accuracy, combine Bollinger Bands with:\nMoving Average Crossover Patterns\n \nRelative Strength Index (RSI)\nto confirm overbought or oversold conditions\nMACD\nto track momentum shifts\nGolden Crossover Strategy\nfor long-term trend confirmation (Golden Crossover Strategy)\nOption Chain and Implied Volatility\nto optimise options trades (Option Chain, Implied Volatility in Options)\nRisk Management & Position Sizing with Bollinger Bands\nWhen managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility\/wider bands and a larger size for lower volatility\/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing: \nPlacing Stop-Loss:\nPut stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade. \nVolatility-based Position Sizing:\nYou can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods. \nDynamic Resistance or Support:\nThe upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case. \nPosition Sizing for High Volatility:\nFor wide bands, lower the position size to restrict possible losses arising from bigger price swings. \nPosition Sizing for Low Volatility:\nIn the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed. \nConsiderations:\nEnsure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence). \nBollinger Squeeze:\nWatch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases.","attrs_markdown":"Stocks\n\n[Invest in Stocks Invest in stocks, ETFs, IPOs with fast orders. 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View charts, indicators, track your orders , P\\&L and watchlists in a single space](https:\/\/groww.in\/futures-and-options)\n\n[Indices Track markets across the globe](https:\/\/groww.in\/indices)\n\n[Terminal Track charts, orders, positions, watchlists in one place](https:\/\/groww.in\/charts)\n\n[Option chain Analyse chains, view payoffs, create baskets](https:\/\/groww.in\/options\/nifty)\n\n[Pledge Get extra balance for trading](https:\/\/groww.in\/available-for-pledge)\n\n[Commodities Trade in Crude Oil, Gold, Silver and more](https:\/\/groww.in\/commodities)\n\n[API trading Set up and execute trades through our API](https:\/\/groww.in\/trade-api)\n\nMutual Funds\n\n[Invest in Mutual Funds Invest in direct mutual funds at zero charges via lump sump investments or SIPs](https:\/\/groww.in\/mutual-funds)\n\n[Mutual Fund Houses Know about AMCs, funds, fund managers](https:\/\/groww.in\/mutual-funds\/amc)\n\n[NFO’s Track all active NFOs in one place](https:\/\/groww.in\/nfo)\n\n[Mutual Funds by Groww Mutual funds by Groww designed for your investment goals](https:\/\/groww.in\/mutual-funds\/amc\/groww-mutual-funds)\n\n[Start SIP Build long-term wealth through disciplined monthly investing.](https:\/\/groww.in\/mutual-funds\/start-sip)\n\n[Mutual Funds screener Filter funds based on risk, fund size and more](https:\/\/groww.in\/mutual-funds\/filter)\n\n[Track Funds Import funds and track all investments in a single place](https:\/\/groww.in\/track)\n\n[Compare Funds](https:\/\/groww.in\/mutual-funds\/compare)\n\nMore\n\n[SIP calculator Estimate returns on a SIP](https:\/\/groww.in\/calculators\/sip-calculator)\n\n[Brokerage calculator Estimate charges for your trade\/investment](https:\/\/groww.in\/calculators\/brokerage-calculator)\n\n[Margin calculator Estimate balance needed to buy\/sell a stock](https:\/\/groww.in\/calculators\/margin-calculator)\n\n[SWP calculator Returns on your systematic withdrawal plan](https:\/\/groww.in\/calculators\/swp-calculator)\n\n[Pricing Brokerage and charges on Groww](https:\/\/groww.in\/pricing)\n\n[Blog](https:\/\/groww.in\/blog)\n\n# What Are Bollinger Bands? Meaning, Formula & Trading Strategy\n16 February 2026\n\n6 min read\n\n![What Are Bollinger Bands? Meaning, Formula & Trading Strategy](https:\/\/cms-resources.groww.in\/uploads\/1_2_1_8b17374f4f.webp)\n\n![whatsapp](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/whatsappHover.1d05ff00.svg)\n\n![facebook](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/facebookHover.1b8c6597.svg)\n\n![twitter](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/twitterHover.56240533.svg)\n\n![linkedin](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/linkedinHover.091d2117.svg)\n\n![telegram](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/telegramHover.0ea658cc.svg)\n\n![copyToClipboard](https:\/\/assets-netstorage.groww.in\/web-assets\/billion_groww_desktop\/prod\/_next\/static\/media\/copyHover.0edc2b0f.svg)\n\nBollinger Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers.\n\nIn this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies.\n\n## **Introduction to Bollinger Bands**\nBollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines:\n\n- A Simple [Moving Average](https:\/\/groww.in\/p\/moving-average-crossover-pattern) (SMA)\n- An upper band\n- A lower band\n\nThe distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum.\n\n**![](https:\/\/cms-resources.groww.in\/uploads\/Bollinger_Bands_9352953e9c.png)**\n\n## **Who Created Bollinger Bands?**\nBollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms.\n\n## **How Bollinger Bands Are Calculated**\nThe calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility.\n\nHere are the steps for the calculation:\n\n- **Middle Band (SMA):** For the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average.\n- **Standard Deviation:** Work out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility.\n- **Upper Band:** Add the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band.\n- **Lower Band:** Deduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2.\n## **Components of Bollinger Bands**\nHere are some of the main components of Bollinger bands.\n\n### **➤ Middle Band (Simple Moving Average)**\n- Usually, a 20-period Simple Moving Average (SMA).\n- It is primarily helpful for establishing a baseline or trend for the indicator.\n### **➤ Upper and Lower Bands (Standard Deviations)**\n- Plotted two standard deviations below and above the middle SMA line\n- representation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low\n\n**Formula:**\n\n- Upper Band = SMA + (2 × Standard Deviation)\n- Lower Band = SMA - (2 × Standard Deviation)\n## **How to Interpret Bollinger Bands**\nBollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band:\n\n- When the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup.\n- When price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market.\n- When the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum.\n- Traders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average [crossovers](https:\/\/groww.in\/blog\/how-to-use-golden-crossover-strategy).\n- In summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable\\!\n## **Trading Strategies Using Bollinger Bands**\nHere are some of the trading strategies you can deploy with Bollinger bands.\n\n### **Mean Reversion Strategy**\n- Assumes price will revert to the middle band after reaching the upper or lower band\n- Ideal for **range-bound or sideways markets**\n\n**Entry:** Buy near the lower band, sell near the upper band\n\n**Stop-loss:** Just outside the bands\n\n**Take profit:** Near the middle band (SMA)\n\n### **Trend Following Strategy**\n- Enter trades in the direction of a **confirmed breakout**\n- Works best in **strong trending markets**\n\n**Entry:** On breakout with volume confirmation\n\n**Stop-loss:** Inside the band\n\n**Take profit:** Ride the trend, using trailing stops.\n\nFor [options](https:\/\/groww.in\/blog\/best-indicators-for-option-trading), Bollinger Bands can pair well with strategies like **straddles or strangles**, especially when anticipating volatility expansion.\n\n## **Common Mistakes to Avoid**\nHere are some common errors worth avoiding.\n\n- **Assuming all breakouts are sustainable**: Many of them are false without volume confirmation.\n- **Ignoring trend direction:** Bollinger Bands work best when combined with trend analysis.\n- **Using fixed settings for all assets:** Adjust the moving average period and standard deviation to suit different instruments or timeframes.\n- **Forcing trades in a low-volatility market:** Sometimes, the best trade is no trade.\n## **Combining Bollinger Bands with Other Indicators**\nTo improve accuracy, combine Bollinger Bands with:\n\n- **Moving Average Crossover Patterns**\n- **Relative Strength Index (RSI)** to confirm overbought or oversold conditions\n- **MACD** to track momentum shifts\n- **Golden Crossover Strategy** for long-term trend confirmation (Golden Crossover Strategy)\n- **Option Chain and Implied Volatility** to optimise options trades (Option Chain, Implied Volatility in Options)\n## **Risk Management & Position Sizing with Bollinger Bands**\nWhen managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility\/wider bands and a larger size for lower volatility\/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing:\n\n- **Placing Stop-Loss:** Put stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade.\n- **Volatility-based Position Sizing:** You can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods.\n- **Dynamic Resistance or Support:** The upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case.\n- **Position Sizing for High Volatility:** For wide bands, lower the position size to restrict possible losses arising from bigger price swings.\n- **Position Sizing for Low Volatility:** In the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed.\n- **Considerations:** Ensure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence).\n- **Bollinger Squeeze:** Watch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases.\n\n### Disclaimer\nThe stocks mentioned in this article are not recommendations. Please conduct your own research and due diligence before investing. Investment in securities market are subject to market risks, read all the related documents carefully before investing. Please read the Risk Disclosure documents carefully before investing in Equity Shares, Derivatives, Mutual fund, and\/or other instruments traded on the Stock Exchanges. As investments are subject to market risks and price fluctuation risk, there is no assurance or guarantee that the investment objectives shall be achieved. Groww Invest Tech Pvt. Ltd. (Formerly known as Nextbillion Technology Pvt. Ltd) Ltd. do not guarantee any assured returns on any investments. 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All rights reserved.Version: 7.4.9\n\nShare Market\n\nIndices\n\nF\\&O\n\nMutual Funds\n\nETFs\n\nFunds By Groww\n\nCalculators\n\nIPO\n\nMiscellaneous\n\n[Top Gainers Stocks](https:\/\/groww.in\/markets\/top-gainers)[52 Weeks High Stocks](https:\/\/groww.in\/markets\/52-week-high)[Tata Motors](https:\/\/groww.in\/stocks\/tata-motors-ltd)[NHPC](https:\/\/groww.in\/stocks\/nhpc-ltd)[ITC](https:\/\/groww.in\/stocks\/itc-ltd)[Wipro](https:\/\/groww.in\/stocks\/wipro-ltd)[BSE](https:\/\/groww.in\/stocks\/bse-ltd)[NTPC](https:\/\/groww.in\/stocks\/ntpc-green-energy-ltd)\n\n[Top Losers Stocks](https:\/\/groww.in\/markets\/top-losers)[52 Weeks Low Stocks](https:\/\/groww.in\/markets\/52-week-low)[IREDA](https:\/\/groww.in\/stocks\/indian-renewable-energy-development-agency-ltd-1569588972606)[State Bank of India](https:\/\/groww.in\/stocks\/state-bank-of-india)[Adani Power](https:\/\/groww.in\/stocks\/adani-power-ltd)[CDSL](https:\/\/groww.in\/stocks\/central-depository-services-india-ltd)[Cochin Shipyard](https:\/\/groww.in\/stocks\/cochin-shipyard-ltd)[SJVN](https:\/\/groww.in\/stocks\/sjvn-ltd)\n\n[Most Traded Stocks](https:\/\/groww.in\/stocks\/most-bought-stocks-on-groww)[Stocks Market Calender](https:\/\/groww.in\/stocks\/calendar)[Tata Steel](https:\/\/groww.in\/stocks\/tata-steel-ltd)[Tata Power](https:\/\/groww.in\/stocks\/tata-power-company-ltd)[Bharat Heavy Electricals](https:\/\/groww.in\/stocks\/bharat-heavy-electricals-ltd)[Indian Oil Corporation](https:\/\/groww.in\/stocks\/indian-oil-corporation-ltd)[HUDCO](https:\/\/groww.in\/stocks\/housing-urban-development-corporation-ltd)[SAIL](https:\/\/groww.in\/stocks\/steel-authority-of-india-ltd)\n\n[Stocks Feed](https:\/\/groww.in\/stock-feed)[Suzlon Energy](https:\/\/groww.in\/stocks\/suzlon-energy-ltd)[Zomato (Eternal)](https:\/\/groww.in\/stocks\/zomato-ltd)[Yes Bank](https:\/\/groww.in\/stocks\/yes-bank-ltd)[Infosys](https:\/\/groww.in\/stocks\/infosys-ltd)[NBCC](https:\/\/groww.in\/stocks\/nbcc-india-ltd)[IRCTC](https:\/\/groww.in\/stocks\/indian-railway-catering-tourism-corpn-ltd)[Share Market Live Update](https:\/\/groww.in\/share-market-today)\n\n[FII DII Activity](https:\/\/groww.in\/fii-dii-data)[IRFC](https:\/\/groww.in\/stocks\/indian-railway-finance-corporation-ltd)[Bharat Electronics](https:\/\/groww.in\/stocks\/bharat-electronics-ltd)[HDFC Bank](https:\/\/groww.in\/stocks\/hdfc-bank-ltd)[Vedanta](https:\/\/groww.in\/stocks\/vedanta-ltd)[Reliance Power](https:\/\/groww.in\/stocks\/reliance-power-ltd)[Jaiprakash Power Ventures](https:\/\/groww.in\/stocks\/jaiprakash-power-ventures-ltd)[Stocks Sectors](https:\/\/groww.in\/stocks\/sectors)\n\n[NIFTY 50](https:\/\/groww.in\/indices\/nifty)[NIFTY Midcap 100](https:\/\/groww.in\/indices\/nifty-midcap)[NIFTY 100](https:\/\/groww.in\/indices\/nifty-218500)[US Tech 100](https:\/\/groww.in\/indices\/global-indices\/nasdaq)[NIFTY Realty](https:\/\/groww.in\/indices\/nifty-realty)[Nikkei index](https:\/\/groww.in\/indices\/global-indices\/nikkei)\n\n[SENSEX](https:\/\/groww.in\/indices\/sp-bse-sensex)[NIFTY Smallcap 100](https:\/\/groww.in\/indices\/nifty-smallcap-100)[NIFTY Auto](https:\/\/groww.in\/indices\/nifty-auto)[Dow Jones Futures](https:\/\/groww.in\/indices\/global-indices\/dow-jones-futures)[NIFTY PSU Bank](https:\/\/groww.in\/indices\/nifty-psu-bank)[NIFTY FMCG](https:\/\/groww.in\/indices\/nifty-fmcg)\n\n[NIFTY BANK](https:\/\/groww.in\/indices\/nifty-bank)[NIFTY MIDCAP 150](https:\/\/groww.in\/indices\/nifty-midcap-150)[KOSPI Index](https:\/\/groww.in\/indices\/global-indices\/kospi)[Dow Jones Index](https:\/\/groww.in\/indices\/global-indices\/dow-jones)[Gift Nifty](https:\/\/groww.in\/indices\/global-indices\/sgx-nifty)[BSE BANKEX](https:\/\/groww.in\/indices\/sp-bse-bankex)\n\n[India VIX](https:\/\/groww.in\/indices\/india-vix)[NIFTY Pharma](https:\/\/groww.in\/indices\/nifty-pharma)[HANG SENG Index](https:\/\/groww.in\/indices\/global-indices\/hang-seng)[BSE 100](https:\/\/groww.in\/indices\/bse-100)[FTSE 100 Index](https:\/\/groww.in\/indices\/global-indices\/ftse)[S\\&P 500](https:\/\/groww.in\/indices\/global-indices\/sp-500)\n\n[NIFTY NEXT 50](https:\/\/groww.in\/indices\/nifty-next)[NIFTY Metal](https:\/\/groww.in\/indices\/nifty-metal)[DAX Index](https:\/\/groww.in\/indices\/global-indices\/dax)[NIFTY Fin Service](https:\/\/groww.in\/indices\/nifty-financial-services)[CAC Index](https:\/\/groww.in\/indices\/global-indices\/cac)[Nifty Pvt Bank](https:\/\/groww.in\/indices\/nifty-pvt-bank)\n\n[NIFTY Bank Options](https:\/\/groww.in\/options\/nifty-bank)[SBI Options](https:\/\/groww.in\/options\/state-bank-of-india)[Bajaj Finance Options](https:\/\/groww.in\/options\/bajaj-finance-ltd)[Axis Bank Options](https:\/\/groww.in\/options\/axis-bank-ltd)[Hindustan Unilever Options](https:\/\/groww.in\/options\/hindustan-unilever-ltd)[NIFTY Bank Futures](https:\/\/groww.in\/futures\/nifty-bank)[Finnifty Futures](https:\/\/groww.in\/futures\/nifty-financial-services)[ITC Futures](https:\/\/groww.in\/futures\/itc-ltd)[ICICI Bank Futures](https:\/\/groww.in\/futures\/icici-bank-ltd)[Biocon Futures](https:\/\/groww.in\/futures\/biocon-ltd)[Indusind Bank Futures](https:\/\/groww.in\/futures\/indusind-bank-ltd)[Crude Oil Mini Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_crudeoilm)[Gold Petal Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_goldpetal)[Silver Micro Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_silvermic)[Nickel Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_nickel)[Natural Gas Mini MCX Option Chain](https:\/\/groww.in\/commodities\/options\/mcx_natgasmini)[Copper MCX Option Chain](https:\/\/groww.in\/commodities\/options\/mcx_copper)\n\n[NIFTY 50 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Futures](https:\/\/groww.in\/futures\/hindustan-copper-ltd)[Crude Oil Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_crudeoil)[Gold Guinea Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_goldguinea)[Silver Mini Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_silverm)[Electricity Future Price](https:\/\/groww.in\/commodities\/futures\/mcx_elecdmbl)[Natural Gas MCX Option Chain](https:\/\/groww.in\/commodities\/options\/mcx_naturalgas)[Zinc MCX Option Chain](https:\/\/groww.in\/commodities\/options\/mcx_zinc)\n\n[MF Screener](https:\/\/groww.in\/mutual-funds\/filter)[Debt Mutual Funds](https:\/\/groww.in\/mutual-funds\/debt-funds)[Best Multicap Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-multi-cap-mutual-funds)[Best Contra Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-contra-mutual-funds)[Best Conservative Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-conservative-mutual-funds)[SBI Contra 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India](https:\/\/groww.in\/mutual-funds\/amc\/nippon-india-mutual-funds)[TATA](https:\/\/groww.in\/mutual-funds\/amc\/tata-mutual-funds)[Bandhan](https:\/\/groww.in\/mutual-funds\/amc\/bandhan-mutual-funds)[Edelweiss](https:\/\/groww.in\/mutual-funds\/amc\/edelweiss-mutual-funds)[HSBC](https:\/\/groww.in\/mutual-funds\/amc\/hsbc-mutual-funds)[Union](https:\/\/groww.in\/mutual-funds\/amc\/union-mutual-funds)[Quantum](https:\/\/groww.in\/mutual-funds\/amc\/quantum-mutual-funds)[Shriram](https:\/\/groww.in\/mutual-funds\/amc\/shriram-mutual-funds)\n\n[Compare Mutual Funds](https:\/\/groww.in\/mutual-funds\/compare)[Best Debt Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-debt-mutual-funds)[Best Large Cap Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-large-cap-mutual-funds)[Best Value Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-value-mutual-funds)[Parag Parikh Flexi Cap 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India](https:\/\/groww.in\/mutual-funds\/amc\/bank-of-india-mutual-funds)[Bajaj Finserv](https:\/\/groww.in\/mutual-funds\/amc\/bajaj-finserv-mutual-funds)[Helios](https:\/\/groww.in\/mutual-funds\/amc\/helios-mutual-funds)[ITI](https:\/\/groww.in\/mutual-funds\/amc\/iti-mutual-funds)[Trust](https:\/\/groww.in\/mutual-funds\/amc\/trust-mutual-funds)\n\n[MF Knowledge Centre](https:\/\/groww.in\/blog\/category\/mutual-funds)[Best Equity Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-equity-mutual-funds)[Best Small Cap Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-small-cap-mutual-funds)[Best Arbitrage Mutual funds](https:\/\/groww.in\/mutual-funds\/category\/best-arbitrage-mutual-funds)[Motilal Oswal Midcap Fund](https:\/\/groww.in\/mutual-funds\/motilal-oswal-most-focused-midcap-30-fund-direct-growth)[SBI Small Cap Fund](https:\/\/groww.in\/mutual-funds\/sbi-small-midcap-fund-direct-growth)[HDFC Small Cap Fund](https:\/\/groww.in\/mutual-funds\/hdfc-small-cap-fund-direct-growth)[Kotak Multicap Fund](https:\/\/groww.in\/mutual-funds\/kotak-multicap-fund-direct-growth)[ICICI Prudential Infrastructure Fund](https:\/\/groww.in\/mutual-funds\/icici-prudential-infrastructure-fund-direct-growth)[Bandhan Nifty Alpha 50 Index Fund](https:\/\/groww.in\/mutual-funds\/bandhan-nifty-alpha-50-index-fund-direct-growth)[SBI](https:\/\/groww.in\/mutual-funds\/amc\/sbi-mutual-funds)[Quant](https:\/\/groww.in\/mutual-funds\/amc\/quant-mutual-funds)[Mirae Asset](https:\/\/groww.in\/mutual-funds\/amc\/mirae-asset-mutual-funds)[DSP](https:\/\/groww.in\/mutual-funds\/amc\/dsp-mutual-funds)[Baroda BNP Paribas](https:\/\/groww.in\/mutual-funds\/amc\/baroda-bnp-paribas-mutual-funds)[Mahindra 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Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers.\n\nIn this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies.\n\n## **Introduction to Bollinger Bands**\nBollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines:\n\n- A Simple [Moving Average](https:\/\/groww.in\/p\/moving-average-crossover-pattern) (SMA)\n- An upper band\n- A lower band\n\nThe distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum.\n\n**![](https:\/\/cms-resources.groww.in\/uploads\/Bollinger_Bands_9352953e9c.png)**\n\n## **Who Created Bollinger Bands?**\nBollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms.\n\n## **How Bollinger Bands Are Calculated**\nThe calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility.\n\nHere are the steps for the calculation:\n\n- **Middle Band (SMA):** For the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average.\n- **Standard Deviation:** Work out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility.\n- **Upper Band:** Add the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band.\n- **Lower Band:** Deduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2.\n## **Components of Bollinger Bands**\nHere are some of the main components of Bollinger bands.\n\n### **➤ Middle Band (Simple Moving Average)**\n- Usually, a 20-period Simple Moving Average (SMA).\n- It is primarily helpful for establishing a baseline or trend for the indicator.\n### **➤ Upper and Lower Bands (Standard Deviations)**\n- Plotted two standard deviations below and above the middle SMA line\n- representation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low\n\n**Formula:**\n\n- Upper Band = SMA + (2 × Standard Deviation)\n- Lower Band = SMA - (2 × Standard Deviation)\n## **How to Interpret Bollinger Bands**\nBollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band:\n\n- When the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup.\n- When price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market.\n- When the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum.\n- Traders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average [crossovers](https:\/\/groww.in\/blog\/how-to-use-golden-crossover-strategy).\n- In summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable\\!\n## **Trading Strategies Using Bollinger Bands**\nHere are some of the trading strategies you can deploy with Bollinger bands.\n\n### **Mean Reversion Strategy**\n- Assumes price will revert to the middle band after reaching the upper or lower band\n- Ideal for **range-bound or sideways markets**\n\n**Entry:** Buy near the lower band, sell near the upper band\n\n**Stop-loss:** Just outside the bands\n\n**Take profit:** Near the middle band (SMA)\n\n### **Trend Following Strategy**\n- Enter trades in the direction of a **confirmed breakout**\n- Works best in **strong trending markets**\n\n**Entry:** On breakout with volume confirmation\n\n**Stop-loss:** Inside the band\n\n**Take profit:** Ride the trend, using trailing stops.\n\nFor [options](https:\/\/groww.in\/blog\/best-indicators-for-option-trading), Bollinger Bands can pair well with strategies like **straddles or strangles**, especially when anticipating volatility expansion.\n\n## **Common Mistakes to Avoid**\nHere are some common errors worth avoiding.\n\n- **Assuming all breakouts are sustainable**: Many of them are false without volume confirmation.\n- **Ignoring trend direction:** Bollinger Bands work best when combined with trend analysis.\n- **Using fixed settings for all assets:** Adjust the moving average period and standard deviation to suit different instruments or timeframes.\n- **Forcing trades in a low-volatility market:** Sometimes, the best trade is no trade.\n## **Combining Bollinger Bands with Other Indicators**\nTo improve accuracy, combine Bollinger Bands with:\n\n- **Moving Average Crossover Patterns**\n- **Relative Strength Index (RSI)** to confirm overbought or oversold conditions\n- **MACD** to track momentum shifts\n- **Golden Crossover Strategy** for long-term trend confirmation (Golden Crossover Strategy)\n- **Option Chain and Implied Volatility** to optimise options trades (Option Chain, Implied Volatility in Options)\n## **Risk Management & Position Sizing with Bollinger Bands**\nWhen managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility\/wider bands and a larger size for lower volatility\/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing:\n\n- **Placing Stop-Loss:** Put stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade.\n- **Volatility-based Position Sizing:** You can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods.\n- **Dynamic Resistance or Support:** The upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case.\n- **Position Sizing for High Volatility:** For wide bands, lower the position size to restrict possible losses arising from bigger price swings.\n- **Position Sizing for Low Volatility:** In the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed.\n- **Considerations:** Ensure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence).\n- **Bollinger Squeeze:** Watch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases.","meta_canonical":null}

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Boilerpipe Text	Bollinger Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers. In this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies. Introduction to Bollinger Bands Bollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines: A Simple Moving Average (SMA) An upper band A lower band The distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum. Who Created Bollinger Bands? Bollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms. How Bollinger Bands Are Calculated The calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility. Here are the steps for the calculation: Middle Band (SMA): For the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average. Standard Deviation: Work out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility. Upper Band: Add the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band. Lower Band: Deduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2. Components of Bollinger Bands Here are some of the main components of Bollinger bands. ➤ Middle Band (Simple Moving Average) Usually, a 20-period Simple Moving Average (SMA). It is primarily helpful for establishing a baseline or trend for the indicator. ➤ Upper and Lower Bands (Standard Deviations) Plotted two standard deviations below and above the middle SMA line representation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low Formula: Upper Band = SMA + (2 × Standard Deviation) Lower Band = SMA - (2 × Standard Deviation) How to Interpret Bollinger Bands Bollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band: When the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup. When price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market. When the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum. Traders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average crossovers . In summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable! Trading Strategies Using Bollinger Bands Here are some of the trading strategies you can deploy with Bollinger bands. Mean Reversion Strategy Assumes price will revert to the middle band after reaching the upper or lower band Ideal for range-bound or sideways markets Entry: Buy near the lower band, sell near the upper band Stop-loss: Just outside the bands Take profit: Near the middle band (SMA) Trend Following Strategy Enter trades in the direction of a confirmed breakout Works best in strong trending markets Entry: On breakout with volume confirmation Stop-loss: Inside the band Take profit: Ride the trend, using trailing stops. For options , Bollinger Bands can pair well with strategies like straddles or strangles , especially when anticipating volatility expansion. Common Mistakes to Avoid Here are some common errors worth avoiding. Assuming all breakouts are sustainable : Many of them are false without volume confirmation. Ignoring trend direction: Bollinger Bands work best when combined with trend analysis. Using fixed settings for all assets: Adjust the moving average period and standard deviation to suit different instruments or timeframes. Forcing trades in a low-volatility market: Sometimes, the best trade is no trade. Combining Bollinger Bands with Other Indicators To improve accuracy, combine Bollinger Bands with: Moving Average Crossover Patterns Relative Strength Index (RSI) to confirm overbought or oversold conditions MACD to track momentum shifts Golden Crossover Strategy for long-term trend confirmation (Golden Crossover Strategy) Option Chain and Implied Volatility to optimise options trades (Option Chain, Implied Volatility in Options) Risk Management & Position Sizing with Bollinger Bands When managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility/wider bands and a larger size for lower volatility/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing: Placing Stop-Loss: Put stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade. Volatility-based Position Sizing: You can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods. Dynamic Resistance or Support: The upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case. Position Sizing for High Volatility: For wide bands, lower the position size to restrict possible losses arising from bigger price swings. Position Sizing for Low Volatility: In the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed. Considerations: Ensure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence). Bollinger Squeeze: Watch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases.
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Meaning, Formula & Trading Strategy 16 February 2026 6 min read ![What Are Bollinger Bands? Meaning, Formula & Trading Strategy](https://cms-resources.groww.in/uploads/1_2_1_8b17374f4f.webp) ![whatsapp](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/whatsappHover.1d05ff00.svg) ![facebook](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/facebookHover.1b8c6597.svg) ![twitter](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/twitterHover.56240533.svg) ![linkedin](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/linkedinHover.091d2117.svg) ![telegram](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/telegramHover.0ea658cc.svg) ![copyToClipboard](https://assets-netstorage.groww.in/web-assets/billion_groww_desktop/prod/_next/static/media/copyHover.0edc2b0f.svg) Bollinger Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers. In this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies. ## Introduction to Bollinger Bands Bollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines: - A Simple [Moving Average](https://groww.in/p/moving-average-crossover-pattern) (SMA) - An upper band - A lower band The distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum. ![](https://cms-resources.groww.in/uploads/Bollinger_Bands_9352953e9c.png) ## Who Created Bollinger Bands? Bollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms. ## How Bollinger Bands Are Calculated The calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility. Here are the steps for the calculation: - Middle Band (SMA): For the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average. - Standard Deviation: Work out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility. - Upper Band: Add the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band. - Lower Band: Deduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2. ## Components of Bollinger Bands Here are some of the main components of Bollinger bands. ### ➤ Middle Band (Simple Moving Average) - Usually, a 20-period Simple Moving Average (SMA). - It is primarily helpful for establishing a baseline or trend for the indicator. ### ➤ Upper and Lower Bands (Standard Deviations) - Plotted two standard deviations below and above the middle SMA line - representation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low Formula: - Upper Band = SMA + (2 × Standard Deviation) - Lower Band = SMA - (2 × Standard Deviation) ## How to Interpret Bollinger Bands Bollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band: - When the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup. - When price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market. - When the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum. - Traders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average [crossovers](https://groww.in/blog/how-to-use-golden-crossover-strategy). - In summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable\! ## Trading Strategies Using Bollinger Bands Here are some of the trading strategies you can deploy with Bollinger bands. ### Mean Reversion Strategy - Assumes price will revert to the middle band after reaching the upper or lower band - Ideal for range-bound or sideways markets Entry: Buy near the lower band, sell near the upper band Stop-loss: Just outside the bands Take profit: Near the middle band (SMA) ### Trend Following Strategy - Enter trades in the direction of a confirmed breakout - Works best in strong trending markets Entry: On breakout with volume confirmation Stop-loss: Inside the band Take profit: Ride the trend, using trailing stops. For [options](https://groww.in/blog/best-indicators-for-option-trading), Bollinger Bands can pair well with strategies like straddles or strangles, especially when anticipating volatility expansion. ## Common Mistakes to Avoid Here are some common errors worth avoiding. - Assuming all breakouts are sustainable: Many of them are false without volume confirmation. - Ignoring trend direction: Bollinger Bands work best when combined with trend analysis. - Using fixed settings for all assets: Adjust the moving average period and standard deviation to suit different instruments or timeframes. - Forcing trades in a low-volatility market: Sometimes, the best trade is no trade. ## Combining Bollinger Bands with Other Indicators To improve accuracy, combine Bollinger Bands with: - Moving Average Crossover Patterns - Relative Strength Index (RSI) to confirm overbought or oversold conditions - MACD to track momentum shifts - Golden Crossover Strategy for long-term trend confirmation (Golden Crossover Strategy) - Option Chain and Implied Volatility to optimise options trades (Option Chain, Implied Volatility in Options) ## Risk Management & Position Sizing with Bollinger Bands When managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility/wider bands and a larger size for lower volatility/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing: - Placing Stop-Loss: Put stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade. - Volatility-based Position Sizing: You can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods. - Dynamic Resistance or Support: The upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case. - Position Sizing for High Volatility: For wide bands, lower the position size to restrict possible losses arising from bigger price swings. - Position Sizing for Low Volatility: In the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed. - Considerations: Ensure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence). - Bollinger Squeeze: Watch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases. ### Disclaimer The stocks mentioned in this article are not recommendations. Please conduct your own research and due diligence before investing. Investment in securities market are subject to market risks, read all the related documents carefully before investing. Please read the Risk Disclosure documents carefully before investing in Equity Shares, Derivatives, Mutual fund, and/or other instruments traded on the Stock Exchanges. As investments are subject to market risks and price fluctuation risk, there is no assurance or guarantee that the investment objectives shall be achieved. Groww Invest Tech Pvt. Ltd. (Formerly known as Nextbillion Technology Pvt. Ltd) Ltd. do not guarantee any assured returns on any investments. Past performance of securities/instruments is not indicative of their future performance. Do you like this edition? 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Readable Markdown	Bollinger Bands are both versatile and one of the most widely used technical indicators in the trading world. Whether you are trading stocks, options, or futures, Bollinger Bands help you visualise price action for volatility, potential breakouts, or reversals defined by solid numbers. In this guide, we will cover the basics of Bollinger Bands, how to use them, common errors, and real-world trading strategies. ## Introduction to Bollinger Bands Bollinger Bands are a volatility-based technical analysis indicator that consists of three calculation lines: - A Simple [Moving Average](https://groww.in/p/moving-average-crossover-pattern) (SMA) - An upper band - A lower band The distance between the bands expands or contracts based on market volatility: when volatility is high, the bands expand, and when volatility is low, they narrow. Traders commonly use Bollinger Bands to identify overbought or oversold levels, pattern breakouts, and low-volatility areas that may signal future momentum. ![](https://cms-resources.groww.in/uploads/Bollinger_Bands_9352953e9c.png) ## Who Created Bollinger Bands? Bollinger Bands are named after their creator, John Bollinger, who developed them in the 1980s. John utilised a dynamic technical indicator that could adapt to underlying market conditions, rather than the static trading ranges regularly used by traders. Currently, Bollinger Bands are a standard indicator on nearly all trading platforms. ## How Bollinger Bands Are Calculated The calculation of Bollinger Bands is done with a Simple Moving Average or SMA for the middle band and the standard deviations for the lower and upper bands. It is typically done over 20 periods, with the Middle Band being the 20-day SMA and the Upper Band being the SMA plus 2 standard deviations. The Lower Band in this case is the SMA, which is two standard deviations below the price to track price volatility. Here are the steps for the calculation: - Middle Band (SMA): For the set period (say 20 days), sum the closing prices and then divide them by the number of periods. This will calculate the 20-day Simple Moving Average. - Standard Deviation: Work out the standard deviation for the exact price figures (say 20 days) used for the SMA. This measures the price volatility. - Upper Band: Add the standard deviation (multiplied by the set factor, mostly 2) to the Middle Band. So, it is the Standard Deviation x 2 + Middle Band. - Lower Band: Deduct the standard deviation (multiplied by the same factor, mostly 2) from the Middle Band. So, in this case, it is Middle Band - Standard Deviation x 2. ## Components of Bollinger Bands Here are some of the main components of Bollinger bands. ### ➤ Middle Band (Simple Moving Average) - Usually, a 20-period Simple Moving Average (SMA). - It is primarily helpful for establishing a baseline or trend for the indicator. ### ➤ Upper and Lower Bands (Standard Deviations) - Plotted two standard deviations below and above the middle SMA line - representation of price volatility with st. Dev. indicating volatility: wider bands = high; narrower bands = low Formula: - Upper Band = SMA + (2 × Standard Deviation) - Lower Band = SMA - (2 × Standard Deviation) ## How to Interpret Bollinger Bands Bollinger Bands are an effective technical indicator that helps traders visualise price squeezes, low volatility, and gaps, as well as potential trading opportunities. A Bollinger Band is made up of three bands: a central band (the default setting is a 20-period Simple Moving Average), and two outer bands that are two standard deviations away from the central band. Here is how to correctly interpret a Bollinger Band: - When the bands come together and contract closely, it signals a Bollinger Band squeeze, a sign of low volatility. Typically, this is viewed as a warning to traders that a sharp price movement or breakout is imminent, either up or down. Traders keep a close eye on squeezes because they can quickly develop into a profitable trade setup. - When price comes in contact with, or breaches, an upper or lower band, it indicates that price is either overbought (upper band) or oversold (lower band). However, it is important to note that just because the price is touching the upper or lower band, it does not mean it is an automatic signal for price reversal; price can and often will continue up or down in the direction of the trend, especially in a strong bullish or bearish market. - When the price can ride the upper band, it indicates strong bullish momentum. When price consistently trades in the lower band, it should be viewed as bearish momentum. - Traders use volume to confirm a breakout (or potential reversal). To increase projections, traders often add Bollinger Bands alongside other indicators, such as RSI, MACD, or Moving Average [crossovers](https://groww.in/blog/how-to-use-golden-crossover-strategy). - In summary, while Bollinger Bands can identify squeezes, breakouts, and overextensions, it is always a good idea to have other confirmation tools to make your profits more reliable\! ## Trading Strategies Using Bollinger Bands Here are some of the trading strategies you can deploy with Bollinger bands. ### Mean Reversion Strategy - Assumes price will revert to the middle band after reaching the upper or lower band - Ideal for range-bound or sideways markets Entry: Buy near the lower band, sell near the upper band Stop-loss: Just outside the bands Take profit: Near the middle band (SMA) ### Trend Following Strategy - Enter trades in the direction of a confirmed breakout - Works best in strong trending markets Entry: On breakout with volume confirmation Stop-loss: Inside the band Take profit: Ride the trend, using trailing stops. For [options](https://groww.in/blog/best-indicators-for-option-trading), Bollinger Bands can pair well with strategies like straddles or strangles, especially when anticipating volatility expansion. ## Common Mistakes to Avoid Here are some common errors worth avoiding. - Assuming all breakouts are sustainable: Many of them are false without volume confirmation. - Ignoring trend direction: Bollinger Bands work best when combined with trend analysis. - Using fixed settings for all assets: Adjust the moving average period and standard deviation to suit different instruments or timeframes. - Forcing trades in a low-volatility market: Sometimes, the best trade is no trade. ## Combining Bollinger Bands with Other Indicators To improve accuracy, combine Bollinger Bands with: - Moving Average Crossover Patterns - Relative Strength Index (RSI) to confirm overbought or oversold conditions - MACD to track momentum shifts - Golden Crossover Strategy for long-term trend confirmation (Golden Crossover Strategy) - Option Chain and Implied Volatility to optimise options trades (Option Chain, Implied Volatility in Options) ## Risk Management & Position Sizing with Bollinger Bands When managing risks with Bollinger Bands, use the band width for position sizing: a smaller size for high volatility/wider bands and a larger size for lower volatility/narrower bands. You also have to set stops below the lower band for long trades or above the upper band for shorter trades. Here are some key aspects worth noting in terms of risk management and position sizing: - Placing Stop-Loss: Put stops right outside the bands, i.e. below the lower band for a long trade and above the upper band for a short trade. - Volatility-based Position Sizing: You can adjust the trade size based on the volatility bandwidth. In this case, it equates to smaller positions during wide bands or high volatility, and possibly larger positions during narrow bands or low volatility periods. - Dynamic Resistance or Support: The upper band may be used as resistance, while the lower band can be used as support for any mean-reversion trades. However, being careful about breakouts is necessary in this case. - Position Sizing for High Volatility: For wide bands, lower the position size to restrict possible losses arising from bigger price swings. - Position Sizing for Low Volatility: In the case of narrow bands, it suggests a potential big move. You may take slightly larger positions with tighter stops, or wait until the breakout is confirmed. - Considerations: Ensure your potential reward justifies your overall risk, using the band levels to set targets. Always use Bollinger Bands in conjunction with added indicators, such as the RSI (Relative Strength Index) or the MACD (Moving Average Convergence Divergence). - Bollinger Squeeze: Watch for narrow-band periods that precede volatility. However, strict stops are necessary, since breakouts may eventually be false in such cases.
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