# Narrow range day — NSE scan

> A day's range under half the stock's own ATR — the coil before the spring.

Canonical: https://patternsradar.com/screener/narrow-range-day

```sift
where true_range < 0.5x atr(14) and close > sma(50)
```

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.

Category: [Volatility](https://patternsradar.com/scans/volatility.md). Default universe: top 500 NSE stocks by 20-day turnover.

Guides: [Bollinger band squeeze screener for NSE](https://patternsradar.com/blog/bollinger-band-squeeze-screener.md).

The rendered page runs this scan against the latest session and can replay it across the last 250 sessions to measure its hit rate: https://patternsradar.com/screener/narrow-range-day.