Screens / Gap
Gap stock screeners, backtested
Gap screens track stocks opening well above or below the prior close and how the rest of the day resolves. We tested 3 gap screens on 518 S&P 500 and Nasdaq-100 stocks from 2021-10-13 to 2026-10-12: 8,013 signals in total. Ranked by 5-day hit rate; compare against SPY's average move on the same days.
Gap screens ranked
| # | Screen | Hit rate | Avg 5d | SPY 5d | Max DD | Signals |
|---|---|---|---|---|---|---|
| 1 | Gap Down Reversal Gap | 55.2% | +1.09% | +0.77% | -35.0% | 4,524 |
| 2 | Gap Down Continuation Gap | 53.9% | +1.47% | +0.45% | -33.8% | 2,271 |
| 3 | Gap Up on Volume Gap | 50.3% | +0.50% | +0.39% | -34.9% | 1,218 |
Other categories
Simulated daily-bar backtest; no fees or slippage; survivorship-biased universe. See methodology. Not financial advice.