When the bands squeeze,
a big move is loading
Markets alternate between quiet consolidation and explosive directional moves. Bollinger Bands make that cycle visible. When the bands narrow to their tightest point in weeks, a stock is coiling before it springs — and the trade is set up before the breakout happens.
Bollinger Bands plot a moving average flanked by two bands set at 2 standard deviations above and below. When volatility is high, the bands widen. When volatility is low, they squeeze. The Bollinger Squeeze is the setup: bands contracting to multi-week lows signals that a big directional move is imminent. The direction is not predetermined — use EMA alignment, RSI, and OBV to decide which way to lean when the squeeze fires.
How Bollinger Bands are built
John Bollinger introduced the indicator in the 1980s. The construction is straightforward:
| Component | Formula | Default | Role |
|---|---|---|---|
| Middle band | 20-period Simple Moving Average | SMA 20 | The trend baseline. Price tends to revert to this line after extended moves away from it. |
| Upper band | Middle band + (2 × standard deviation) | +2σ | Dynamic resistance in ranging markets. In a strong uptrend, price “walks” along the upper band for extended periods. |
| Lower band | Middle band − (2 × standard deviation) | −2σ | Dynamic support in ranging markets. In a strong downtrend, price walks the lower band lower. |
The standard deviation insight: At 2 standard deviations, statistically roughly 95% of price action should be contained within the bands. When price consistently closes outside a band, it is doing something statistically unusual — either very strong momentum (upper band walk) or very strong selling (lower band walk).
Volatility at a low. Market is undecided. A breakout above or below the bands is the trigger.
Price hugging the upper band. Do not short this — stay long and hold until price closes back through mid-band.
Bands have expanded after a big move. Volatility is high. Do not chase — wait for bands to contract and a new squeeze before the next entry.
The three Bollinger Band scenarios
The Bollinger Squeeze
Bandwidth narrows to a multi-week low. Volatility has compressed. The market is coiling. The longer the squeeze holds, the more powerful the expansion that follows. Position before the break, not after.
Upper band walk
Price closes above or at the upper band on multiple consecutive sessions. This is a sign of exceptional momentum — the stock is in markup phase. Hold your position. Do not try to fade strength by shorting the band.
Band touch + reversal candle
Price touches the upper band and forms a bearish reversal candle (shooting star, engulfing, doji) on declining volume. Combined with RSI divergence or MACD histogram shrinking, this is a valid exit or short-side entry setup.
Bandwidth: quantifying the squeeze
Bandwidth is the numerical measure of how wide or tight the bands are, relative to the middle band:
Bandwidth = (Upper Band − Lower Band) / Middle Band × 100
When bandwidth drops to its lowest level in 6 months (sometimes called a “Bollinger Squeeze” or TTM Squeeze), the stock is in peak compression. Historically, this precedes the sharpest directional moves. Watch bandwidth alongside the price action — when bandwidth starts rising after a long compression, the expansion phase has begun.
The direction problem: Bollinger Bands tell you when a move is coming but not which direction. A squeeze fires up just as often as it fires down. This is why you must combine it with directional indicators: bullish EMA stack + rising OBV + RSI in the 50–65 zone before the squeeze = lean long. Bearish stack + falling OBV + RSI under 50 = lean short or stand aside.
%B: where is price within the bands?
%B tells you exactly where the current price sits relative to the bands on a 0–1 scale:
| %B value | Price position | Interpretation |
|---|---|---|
| Above 1.0 | Above upper band | Statistically extended. In a sideways range, fade opportunity. In a trend, could be start of a band walk. |
| 0.5 | At the middle band (SMA 20) | Neutral. In bull trends, price bouncing off mid-band is a continuation pattern. In bear trends, it is resistance. |
| 0.0 | At the lower band | Near support in bull trends. A bounce from lower band with rising RSI and volume dry-up is a potential long entry. |
| Below 0.0 | Below lower band | Statistically extended to downside. In a downtrend, this is a lower band walk — do not buy because “it looks cheap.” |
Bollinger Bands as the Level 2 capstone
Bollinger Bands are the most useful when layered on top of everything covered in Lessons 7–10. Each prior indicator answers a different question, and Bollinger Bands pull it together:
- EMAs (Lesson 7) tell you the trend direction and dynamic support levels. Is the squeeze setting up above or below EMA 200? If below, it fires down more often.
- RSI (Lesson 8) tells you whether momentum is building into the squeeze. RSI in the 55–65 zone as bands compress = momentum is quietly loading. RSI slipping below 45 during compression = the move is more likely to fire down.
- MACD (Lesson 9) tells you whether momentum is accelerating or decelerating. A MACD histogram that starts ticking up while bandwidth is still low is an early fire signal from the squeeze.
- OBV (Lesson 10) tells you which side the institutional money is on. OBV making new highs during a Bollinger Squeeze is the cleanest confirmation that the smart money is positioned long before the bands expand.
The complete Level 2 setup: Bollinger Squeeze (bands at 6-month low) + price above EMA 50 and EMA 200 + OBV trending higher through the compression + RSI holding above 50 + MACD histogram turning positive. When all five align, you have one of the highest-probability setups in swing trading. Size accordingly.
Practical rules for Bollinger Bands on MadStocks
- Scan for tightly coiling stocks with Bollinger Bands at 6-month lows. These are your pre-breakout candidates. Add them to a watchlist and monitor daily.
- Do not enter on the squeeze alone — wait for the first expansion candle. The trigger is when bands start to widen AND price breaks out of the consolidation range on above-average volume. That first volume-backed expansion bar is your entry signal.
- In a strong uptrend, price walking the upper band is not a sell signal. It is a hold signal. Only exit when price closes back through the middle band (SMA 20) on volume, or when RSI shows divergence at a new high.
- Use the middle band as your trailing stop reference in strong trends. As long as price stays above the mid-band on daily closes, the trend is intact. A close below mid-band signals a regime check — verify with EMA 50 and OBV before exiting.
- After a big band expansion, wait for a squeeze to reset before the next entry. The worst entries happen when traders chase a stock that has just had its big move. Bands wide = volatility already released = low edge. Wait for compression to rebuild.
See Bollinger Bands on MadStocks charts
Open any MadStocks stock chart to see Bollinger Bands plotted around the price candles.
