Bollinger Bands: A Practical Guide for Traders

What Are Bollinger Bands?

Bollinger Bands are a technical analysis tool created by John Bollinger in the 1980s. They consist of three lines that help traders identify volatility and potential price reversals.

Components

Middle Band

A 20-period Simple Moving Average (SMA) — the baseline trend.

Upper Band

Middle Band + (2 × Standard Deviation)

Lower Band

Middle Band - (2 × Standard Deviation)

How to Read Bollinger Bands

Band Width

• •Wide bands: High volatility
• •Narrow bands: Low volatility (squeeze)
• •Expanding: Volatility increasing
• •Contracting: Volatility decreasing

Price Position

• •Price near upper band: Potentially overbought
• •Price near lower band: Potentially oversold
• •Price at middle band: Neutral/trending

Trading Strategies

The Squeeze

When bands narrow significantly, a big move is coming:

• •Wait for the squeeze (narrow bands)
• •Watch for breakout direction
• •Enter on the breakout
• •Use the opposite band as target

Mean Reversion

• •Buy when price touches lower band
• •Sell when price touches upper band
• •Works best in ranging markets
• •Add RSI for confirmation

Trend Following

• •In strong uptrends, price rides the upper band
• •In strong downtrends, price rides the lower band
• •Don't counter-trade strong trends

Common Mistakes

• •Using bands alone without confirmation
• •Assuming touches always mean reversals
• •Ignoring the overall trend
• •Not adjusting settings for different timeframes

Conclusion

Bollinger Bands are versatile and can be adapted to multiple trading styles. The key is understanding whether the market is trending or ranging, and applying the appropriate strategy.