Bollinger Band Squeeze — Trading Wiki

What Bollinger Band Squeeze means

A Bollinger Band squeeze occurs when the bands contract to their narrowest width, indicating low volatility that typically precedes an explosive breakout.

In depth

The Bollinger Band squeeze is a volatility-based trading pattern that identifies periods of abnormally low volatility — conditions that historically precede significant directional price moves. Developed by John Bollinger in the 1980s, Bollinger Bands consist of three lines: a 20-period simple moving average (middle band) and two bands set at 2 standard deviations above and below the middle band. The bands expand during periods of high volatility and contract during low volatility. A squeeze occurs when this contraction reaches extreme levels — specifically when the Bandwidth indicator (the percentage difference between upper and lower bands) drops to its lowest value over a defined lookback period, typically 6 months or 125 trading sessions.

The physics analogy is apt: like a coiled spring, compressed volatility stores energy that is eventually released in an explosive directional move. The squeeze itself does not predict direction — only that a significant move is imminent. Traders must use other tools to determine the likely breakout direction. The Bollinger Band squeeze is often combined with the Keltner Channel — another volatility indicator that uses Average True Range (ATR) instead of standard deviations. When the Bollinger Bands contract inside the Keltner Channel, it confirms the squeeze condition and is known as the 'TTM Squeeze' (created by John Carter).

This dual-indicator approach filters out false squeezes and provides higher-conviction signals. Volume analysis is crucial during and after the squeeze. A legitimate breakout from a squeeze should be accompanied by a significant volume expansion — ideally 2-3 times the average volume. Low-volume breakouts from squeezes are more likely to fail and reverse. The initial candle that breaks outside the compressed bands often establishes the direction of the subsequent multi-day or multi-week move.

Key points

• Narrow bands signal low volatility and an impending breakout
• The direction of the breakout determines the trade direction
• Often combined with volume spikes to confirm the move

Practical tip

Combine the Bollinger squeeze with the Keltner Channel overlay. When Bollinger Bands trade INSIDE the Keltner Channel, the squeeze is confirmed. The first momentum bar that breaks outside both indicators is your high-conviction entry.

Why it matters when you are learning

The Bollinger squeeze is like a coiled spring — tight bands mean energy is building. Learning to spot squeezes helps you catch big moves early.

Practising Bollinger Band Squeeze on the simulator

Recognising Bollinger Band Squeeze on a static example is easy; spotting it on the right-hand edge of a live chart, before the outcome is known, is the actual skill. Open the practice desk, scan a handful of instruments you already follow until you find a candidate, and mark the level that would prove the read wrong. Take a small simulated position, then come back a day later and compare what happened with what this page describes. Educational simulation only — not financial advice.