# Range expansion up — NSE scan

> A day twice the stock's normal size, resolved in the buyers' favour.

Canonical: https://patternsradar.com/screener/range-expansion-up

```sift
where true_range > 2x atr(14) and change > 0
```

The opposite bookend to the narrow-range scans: this is the loud day the quiet ones lead to. A true range twice the ATR means the session broke somebody's hand — stops run, a level given up, news absorbed — and the positive close says which side absorbed it. Expansion days set the tone for the sessions that follow more often than chance allows.

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/range-expansion-up.