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Understand Bollinger Bands — squeeze, breakout, mean reversion strategy. A complete guide with real examples on Indian stocks.
Published by The Retail Trader · AUG 02, 2026 · Features
Understand Bollinger Bands — squeeze, breakout, mean reversion strategy. A complete guide with real examples on Indian stocks.
Bollinger Bands are a volatility indicator created by John Bollinger in the 1980s. They are made up of 3 lines:
Keep these three points in mind:
• Middle Band = 20-period SMA (Simple Moving Average)
• Upper Band = Middle Band + (2 × Standard Deviation)
• Lower Band = Middle Band – (2 × Standard Deviation)
In simple words: Bollinger Bands form a "channel" around price. When volatility rises → the bands expand. When volatility falls → the bands squeeze.
Key insight: Price stays around the middle band (20 SMA) most of the time. When price reaches the upper or lower band, the probability of a reversal increases.
Try it on TRT: theretailtrader.org/charting → indicators → Bollinger Bands. Available in the free plan.
Band Expansion (Volatility Is Rising):
• The upper and lower bands are moving apart
• It means the market is getting volatile
• A strong trend is under way
• Trend continuation likely
Band Squeeze (Volatility Is Falling):
• The upper and lower bands are moving closer
• It means the market is calm and consolidating
• A BREAKOUT IS COMING — expansion follows a squeeze
• This is the most important signal!
Band Contraction vs Expansion Cycle:
• Squeeze → Expansion → Contraction → Squeeze → Expansion...
• (calm) (volatile) (calming) (calm) (volatile)
The market is always in this cycle. Squeeze = the calm before the storm.
Setup:
• Bollinger Bands are squeezing (very close together)
• Price consolidating around the middle band
• Suddenly price breaks above the upper band + volume spike
• Buy entry: After the breakout candle closes
• Stop loss: Slightly below the middle band (20 SMA)
• Target: Equal to the band width (measured move)
Sell setup: Reverse — price breaks the lower band + volume.
Logic: Price always comes back toward the middle band (mean reversion).
Buy setup:
• Price touches the lower band
• RSI is oversold (< 30)
• A bullish reversal candle (hammer, bullish engulfing) forms at the lower band
• Entry: After the reversal candle closes
• Target: Middle band (20 SMA)
• Stop loss: Slightly below the lower band
Sell setup: Reverse — price touches the upper band + RSI overbought + bearish candle.
Logic: In a strong trend, price can stay outside the band — "walking the band".
Buy setup:
• Price is above the upper band (strong uptrend)
• Price touches the upper band but closes above the upper band
• Bands expanding
• Entry: Pullback to middle band → bounce
• Stop loss: Middle band break
• Target: Next upper band level
Important: In trend riding, touching the band is not a reversal — it is trend continuation. Don't short just because price touched the upper band in an uptrend!
Bollinger Bands + RSI = best combo for mean reversion trades.
Perfect Buy Setup:
• Price touches the Bollinger Lower Band
• RSI < 30 (oversold)
• Bullish candle pattern (hammer, morning star)
• Volume spike on reversal candle
• Entry: After the candle closes
• Target: Middle band
• Stop loss: Lower band – 1 ATR
Perfect Sell Setup:
• Price touches the Bollinger Upper Band
• RSI > 70 (overbought)
• Bearish candle pattern (shooting star, evening star)
• Volume spike on reversal candle
• Entry: After the candle closes
• Target: Middle band
• Stop loss: Upper band + 1 ATR
Apply Bollinger Bands + RSI on the RELIANCE daily chart. Observe:
• Sometimes price at the lower band + RSI < 30 = bounce back to the middle band
• Sometimes price at the upper band + RSI > 70 = pullback to the middle band
• Breakout with volume after a squeeze = strong move
Default: 20, 2:
• Period (20): SMA of 20 candles
• Std Dev (2): 2 standard deviations
• Best for: Daily charts, swing trading
Custom Settings:
• 20, 2 (default) — Best For: Swing trading, Notes: Standard, reliable
• 20, 1.5 — Best For: Intraday, Notes: Tighter bands, more touches
• 20, 2.5 — Best For: Long-term, Notes: Wider bands, fewer signals
• 50, 2 — Best For: Positional, Notes: Slower, bigger picture
• 10, 2 — Best For: Intraday (fast), Notes: Quick squeeze detection
You can customize the Bollinger Bands settings on the TRT charting terminal. On the Pro plan (₹2,499/mo) the parameters of every indicator can be changed.
Squeeze = the most profitable setup. But manually scanning 1,600+ stocks is impossible.
Options:
• TRT Screener — theretailtrader.org/stock-analysis-landing → Screener
• Filter: Bollinger Band Width < [threshold]
• Sort by: Tightest squeeze
• Pro feature: Screener data export (CSV)
Keep these three points in mind:
• Manual scan: Look at the daily chart of the top 50 stocks
• 5 min per stock × 50 = 2.5 hours daily
• Pro saves time with screener
Keep these points in mind:
• Telegram alerts: Monster Hunk shares squeeze stocks at @theretailtrader_in
Keep these points in mind:
• Taking a trade on every band touch — Upper band touch = sell, lower band touch = buy. WRONG. In a trend, bands get walked. Look at the context.
Keep these points in mind:
• Trading inside a squeeze — During a squeeze, price moves sideways. Wait for the breakout, don't trade inside the squeeze.
Keep these points in mind:
• Taking a trade without setting a target — Bollinger Bands give a target (middle band for mean reversion, band width for breakout). Use it.
Keep these points in mind:
• Using only Bollinger — Without RSI or volume, Bollinger signals are 50% accurate. RSI + volume = 70%+.
Keep these points in mind:
• Changing settings without understanding standard deviation — The default 2 std dev carries statistical significance. Changing it to 1.5 or 2.5 changes the meaning.
Bollinger Bands use Standard Deviation (volatility based). Keltner Channels use ATR. Bollinger is more responsive, Keltner is smoother.
Sometimes 2-3 days, sometimes 2-3 weeks. The longer the squeeze, the bigger the breakout. But you can't predict the exact time.
Yes, but use them on the 5 min or 15 min chart. The 1 min has too much noise. For intraday, try the 20, 1.5 settings.
Yes! The free plan gives you 3 indicators — Bollinger Bands, RSI, and MACD. Try it at theretailtrader.org/charting.
No. ~65-70% accuracy with RSI + volume confirmation. Risk management is always necessary.
Keep these ten points in mind:
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Try Bollinger Bands on TRT: theretailtrader.org/charting Pro (100+ indicators, intraday): theretailtrader.org/pricing — ₹2,499/mo Telegram: @theretailtrader_in
Educational only. NOT investment advice.
This article is for educational purposes only — it is not a buy or sell recommendation, makes no claim of guaranteed returns, and is not advisory. Rules, rates and mechanics are changed from time to time by the exchanges, SEBI and RBI, so verify every number yourself with your broker or the official source.