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BOLLINGER BANDS

Bands 2 standard deviations above and below a 20-period moving average.

Published by The Retail Trader · JUL 31, 2026 · Indicators

Bollinger Bands — bands 2 standard deviations above and below a 20-period moving average. Bands shrink with price.

WHERE THIS FITS IN

This term comes under Indicators, in the section "VOLATILITY and VOLUME". This tells how big the move is and how much participation is behind it:

RELATED TERMS TO READ

Other terms in this group — understanding them together is more useful:
• Squeeze
• ATR (Average True Range)
• Standard Deviation
• Volume
• Volume Spike
• OBV (On Balance Volume)
• VWAP (Volume Weighted Average Price)
• MFI (Money Flow Index)

To read the entire group and all its examples in one place, see the journal "INDICATORS: FORMULA TOOLS" - this term has been taken from there.

This entry is for educational purposes only and is not a recommendation to buy or sell. Exchanges change charges, margins, lot sizes and expiry rules from time to time, so verify any figures with your broker or exchange.

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