Premarket gapper alerts
Get notified before the bell when stocks gap up or down on real volume. For day traders, knowing about these moves before the open is the difference between catching the trade and watching it from the sidelines.
What counts as a real gapper
A premarket gap is a price move that happens before regular market hours. Most are noise — illiquid prints on a few hundred shares that get reverted at the open. The ones worth watching are gaps with two characteristics:
- The percentage move is meaningful (typically more than 3-5%)
- The premarket volume is real (typically more than 100K shares, often more than 500K)
A 6% gap on 200K shares of premarket volume is a real signal. A 6% gap on 1,200 shares is statistical noise. Tickerbot enforces both thresholds.
Why timing matters for gapper alerts
Most gapper scanners only show you what's already gapping when you check them. By that time, the setup is common knowledge. You want to know about the gap as it happens — ideally 30-60 minutes before the bell, when you still have time to research the catalyst and build a thesis.
Tickerbot tracks premarket price action and volume continuously from 4 AM ET onward. Gappers are flagged the moment both the price-change and premarket-volume conditions are met simultaneously.
Stacking with news or earnings
Gappers paired with a known catalyst are much higher conviction. A 6% gap with no obvious reason often fades by midday. A 6% gap on a stock that beat earnings the night before usually holds — and often extends.
Tickerbot lets you combine premarket gap conditions with earnings calendar filters, analyst upgrades, insider buying, and other fundamental catalysts.
Gap-and-go vs. gap-and-fade
Not all gaps are created equal. The highest-conviction premarket gaps are:
- Above average volume relative to the stock's typical premarket activity
- Paired with a known catalyst (earnings, news, upgrade, insider buy)
- In the same direction as the stock's recent trend (momentum confirmation)
- Confirmed by options activity or institutional buying
Tickerbot can filter for all of these conditions to help you distinguish gap-and-go setups from gap-and-fade noise.
Common variations you can build
- Premarket gappers in your watchlist specifically
- Premarket gap-down alerts (the bearish version, useful for short setups)
- Gappers on small caps under $2B market cap (where gaps move the most)
- Gappers paired with unusual options activity
- Gap-and-go follow-through (gap holds in the first 30 minutes of regular hours)
- Earnings gappers (gaps on stocks that reported earnings in the last 24 hours)
Related alerts
Other technical alerts that work well with premarket gappers