Stock gapped up 1% or more at open — potential continuation or fade.
The filter compares the regular-session opening price to the prior day's closing price. A 1% gap means the stock opened at least 1% above its previous close — for a $100 stock, that is a $1 gap. This is a daily-timeframe signal, evaluated at the session open rather than on an intrabar basis. Unlike intraday breakout screens, this signal is fixed at the start of each session — once the gap is formed, it does not change. The 1% threshold filters out the routine noise of small overnight moves and focuses on gaps that represent meaningful demand shifts. There is no volume requirement, so gap-ups on thin premarket volume and gaps on heavy volume are both captured.
Gap-ups resolve in one of two ways: continuation (gap-and-go) or fade (gap fill). Which behavior dominates depends on the catalyst, volume, and market context. Earnings-driven gaps tend to fill more often when the initial reaction overshoots the fundamental change. Technical breakout gaps on strong volume tend to continue, especially when the gap clears a multi-month level. Key failure modes: (1) gap fills intraday — the stock opens 1% above the prior close and then retreats below it by midday, trapping buyers; (2) broad market weakness drags the stock lower despite the positive open; (3) gaps in thin premarket volume that represent a small number of prints rather than real demand. Traders typically wait for the 15-minute opening range to form before committing to a direction — see ORB 15m + VWAP Breakout for the intraday confirmation signal. Gain > 5% captures more extreme single-day moves that often begin with a significant gap up.
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This screener finds stocks that opened the current session at least 1% above the prior day's close — an overnight gap up. The gap represents a repricing event where buyers were willing to pay a premium over yesterday's closing price before the regular session began. Currently 0 stocks match this screen. Swing traders and momentum traders watch gap-ups as potential continuation or fade setups, depending on the catalyst and opening structure. Position traders use gap lists to identify sector rotation and relative strength. Search phrases: stocks gapping up today, overnight gap up screener, gap up 1 percent open. Related screens: Gain > 5%, ORB 15m + VWAP Breakout.