# Bollinger Bands Strategy: Mean Reversion & Squeezes

> Use Bollinger Bands for mean reversion and breakout trades. Band squeezes, walks, and key settings.

- Canonical URL: https://www.fundedready.org/learn/bollinger-bands-strategy/
- Markdown mirror: https://www.fundedready.org/ai/markdown/learn/bollinger-bands-strategy.md
- Content type: Trading guide
- Last reviewed: 2026-04-25

## Quick Answer

Use Bollinger Bands for mean reversion and breakout trades. Band squeezes, walks, and key settings.

## Key Takeaways

- What Bollinger Bands measure: Bollinger Bands plot a 20-period moving average with 2 standard deviations above and below.
- Three Bollinger plays: Band squeeze: when bands narrow to the tightest range in 50+ bars, expect a breakout within a few bars.
- Why Bollinger traders fail: They treat outer band tags as automatic fades.

## What Bollinger Bands measure

Bollinger Bands plot a 20-period moving average with 2 standard deviations above and below. The bands widen during high-volatility periods and narrow during low-volatility periods. This volatility proxy is the core insight: bands squeezed tight means a breakout is coming; bands wide open means the move is already in progress.

## Three Bollinger plays

Band squeeze: when bands narrow to the tightest range in 50+ bars, expect a breakout within a few bars. Enter on the first breakout candle, stop at the middle band. Band walk: in strong trends, price "walks" along the outer band — do not fade this, it's a trend signal. Mean reversion: in ranging markets, tags of the outer bands often mean-revert to the middle band, especially with reversal candles (hammer, engulfing).

## Why Bollinger traders fail

They treat outer band tags as automatic fades. In a strong trend, price touches the outer band and keeps going for 20+ bars — and the mean-reversion trader blows up. Rule: only fade outer bands in ranging markets (ADX 25), use bands for entries in the trend direction, not against.

## FAQ

### Should I change the default 20/2 settings?

Usually no. The 20/2 default has stood for 40 years because it produces a usable standard-deviation band. Fiddling with settings often just curve-fits recent data.

### Are Bollinger Bands better than Keltner channels?

Different tools. Bollinger uses std dev; Keltner uses ATR. Bollinger reacts faster to volatility spikes; Keltner is smoother. Use both together for the "Bollinger inside Keltner" squeeze setup.

## TradingView Setup Help

Want the right indicators on your chart without the guesswork? [IndicatorFit](https://www.indicatorfit.com/) helps you build a clean TradingView indicator stack around your market, timeframe, and trading style, so your chart supports the setup instead of burying it in noise. Use it as setup support, not as a signal service or a promise of trading results.

## Sources and Review Notes

- [FundedReady methodology](https://www.fundedready.org/methodology/): Review process, simulator scope, and educational disclaimers.

FundedReady content is educational. It is not financial advice, a signal service, or a promise that a trading strategy will be profitable.