Bollinger Bands — how to read and use this volatility indicator?

Bollinger Bands look impressive on a chart — 3 lines, statistically calculated. "Price touched the upper band, I sell" says the beginner. Trader with 10 years experience: "price has been walking the upper band 8 candles — strong uptrend, I buy". Same indicator, two different interpretations. Here\'s when each.

Bollinger Bands anatomy

BB consists of 3 lines calculated from last 20 candles:

Statistical logic: if prices have normal distribution, 95% of candles fit within 2 standard deviations of mean. Practically in forex it\'s ~90% (because distribution has fatter tails). Band touch = statistically rare event.

Setup #1: BB Squeeze (strongest)

Squeeze = bands narrow toward each other, volatility shrinks. Statistically a quiet period is followed by a stormy one. Logic:

1. Identification: bands narrowest in last 60-90 candles (BB Width Indicator helps)
2. Wait: price oscillates inside narrow bands
3. Signal: first candle that closes outside band (up or down) with large body
4. Entry: at close of that candle in breakout direction
5. SL: opposite side of SMA20 (middle line)
6. TP: 2× squeeze width (typically 80-200 pips)

Setup #2: Bounce (bouncing) — ONLY in range

Classic forex myth: "price touched upper band, I sell, touched lower, I buy". That works, but only in specific conditions.

Conclusion: don\'t use bounce setup in trend. In trend price walks the band, and your shorts get stopped one by one.

Setup #3: Walk on Band (trend continuation)

Opposite of bounce. In strong trend price walks the band 5-15 candles in a row, touching it regularly. That\'s not reversal, that\'s continuation signal.

1. Identify strong D1 trend (ADX > 30, price above/below EMA50 with large distance)
2. Wait for pullback to SMA20 (BB middle line)
3. Long entry (if uptrend) on bullish candle close at SMA20
4. SL below lower band
5. TP when price stops touching upper band (3+ candles without touch)

Walk-on-band win-rate in strong trend: 60-70%. But CAUTION: must be sure of trend. False trend signal = your position 5 days against reversal.

Most common errors

1. Trade every band touch — in trend it\'s not reversal, it\'s continuation. Filter by ADX.
2. Squeeze on M5/M15 — 80% are false breakouts. Squeeze only matters from H4 up.
3. SL just beyond band — band widens after breakout, normally hits SL. SL opposite side of SMA20.
4. BB as sole criterion — alone = 40% win-rate. BB + price action + trend = 60%+.
5. Modifying settings — (20, 2) is standard. "Improved" values usually overfit.

BB Width — underrated complement

BB Width = (Upper − Lower) / SMA20 × 100. Measures volatility as % of price. Interpretation:

• BB Width < 1% = very narrow squeeze, breakout near
• BB Width 1-3% = normal volatility
• BB Width > 5% = very high volatility, probably post news event

BB Width helps objectively identify squeeze (vs "looks narrow"). Most platforms have it in indicator library.

Bollinger Bands aren\'t a signal — they\'re a volatility map. Read trend context before interpreting band touches.

Practical checklist

Before BB-based entry check:

• ☐ Do I know if I\'m in range (ADX < 25) or trend (ADX > 25)?
• ☐ Does my setup match conditions (bounce for range, walk-on-band for trend, squeeze for breakout)?
• ☐ Do I have price action confirmation (candlestick formation)?
• ☐ Is timeframe H4 or D1 (not M5/M15)?
• ☐ Is SL on opposite side of SMA20 (not just beyond band)?

5/5 — enter. <5 — wait for better setup.