# Down 15% in a month — NSE scan

> Fallen hard over 21 sessions — the damaged list, for bargain hunters and short sellers alike.

Canonical: https://patternsradar.com/screener/big-move-down

```sift
where close down 15% over 21 bars
```

The mirror of the big-move-up scan, and read two opposite ways by two kinds of trader: mean-reversion buyers comb it for overreactions, trend traders for confirmed breakdowns worth pressing. The scan itself is neutral about which is right on any name — a month-long 15% decline is simply a stock where something material changed, and that is worth knowing either way.

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

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/big-move-down.