Narrow range day
A day's range under half the stock's own ATR — the coil before the spring.
Volatility clusters, and its absence does too: an abnormally quiet session tends to sit just before an abnormally loud one, because the quiet is what an exhausted argument looks like. Measuring the range against the stock's own ATR rather than a fixed percentage is what lets one definition of "quiet" fit both a PSU bank and a smallcap. Read the guide: Bollinger band squeeze screener for NSE →
More volatility:Bollinger squeezeWide-range moversGap up and holdGap down and failUp 15% in a month
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