The short answer: The gap and go strategy targets stocks that gap up pre-market and continue higher into the open — but the strategy lives or dies on how well you’ve filtered the list before 9:30. Most gaps fade. The ones that run share a short profile: a real catalyst, meaningful volume, and a float that doesn’t dilute the move before it starts.
What the Gap and Go Strategy Actually Is
A gap up happens when a stock opens higher than it closed the previous session. The gap and go is the trade: you buy the breakout at or just after the open, expecting the move to continue.
The logic is simple. Stocks that gap on news and high volume have institutional attention. If sellers can’t push the price back below the prior close in the first few minutes, the path of least resistance is up.
The hard part isn’t understanding the setup. It’s identifying which gappers are worth trading before the market opens — and ignoring the rest.
Why Most Gap Setups Fail Before 9:31
On any given morning you might see 30–80 stocks gapping 5% or more pre-market. Most will fade within the first 15 minutes.
Faders share a pattern: weak volume relative to float, no clean catalyst, gaps driven by overnight sector noise rather than stock-specific news. They open, trigger some buy orders, and get hit by sellers who were waiting.
Runners look different. Volume is already well above average before 9:30. There’s a catalyst you can point to — earnings surprise, FDA approval, partnership announcement. Float is small enough that demand pressure actually moves the price.
The filter work happens pre-market. If you’re making these decisions at 9:31, you’re already late.
Building the Pre-Market Gapper Scan in Scanz
The Data Scanner is where gap and go prep starts. The goal: before the open, produce a short list of stocks worth watching — not everything that moved.
A pre-market gapper scan typically runs three core filters:
Percent Change | PM ≥ 10 — isolates stocks gapping at least 10% pre-market. Tighten or loosen this depending on market conditions.
Volume | PM ≥ 100,000 — volume confirmation is non-negotiable. A 15% gap on 8,000 pre-market shares means nothing. A 15% gap on 300,000 shares is a different conversation.
Last Price — filter to your price range. Most gap and go traders work in the $2–$20 range where moves are fast and float is naturally limited.
You can layer in a float filter to restrict to low-float names specifically. The filter reference has the exact Shares Float filter details.
Run this scan from around 7:00 AM ET. By 8:30 you should have a short list — five to fifteen names depending on market conditions. That list goes to a watchlist. Everything else gets ignored.
Why the News Scanner Belongs in Your Pre-Market Routine
A stock gapping 12% pre-market with 200K volume is interesting. A stock gapping 12% on a positive earnings surprise with 200K volume is a trade candidate.
The News Scanner runs the same filter engine as the Data Scanner, scoped to headlines. Set it to show news only on stocks already on your gapper watchlist and you get catalysts side-by-side with price action — without trawling headlines for every name in the market.
The question you’re answering: is this gap stock-specific or sector noise? Stock-specific gaps on real catalysts hold. Sympathy plays and macro moves fade faster.
Timing the Entry With the Signal Scanner
This is where most gap and go guides fall short. They describe the setup but skip the entry timing.
The Signal Scanner fires events the moment they happen — a stock crossing above a level, printing a new intraday high, breaking above its pre-market high for the first time. That timing edge matters. The Data Scanner shows you a stock currently above its pre-market high, but you don’t know if it crossed one minute ago or thirty.
For the gap and go, configure a Signal that fires when a stock breaks its pre-market high at the open, scoped to your watchlist. The moment it fires, you have real-time breakout confirmation — not a reading you’re checking after the fact.
The full workflow: Data Scanner builds the list pre-market → News Scanner confirms the catalysts → Signal Scanner times the entry.
What Good Execution Actually Looks Like
Once you have your watchlist and a signal configured, the execution decision is binary: did it break pre-market high with volume at the open?
If yes — it’s running.
If it gaps open and immediately starts filling back toward pre-market prices — it’s fading. Skip it.
Most traders who struggle with this setup are either entering too early (pre-market, before the open confirms direction) or watching too many names at once. The scan does the filtering. By the time the bell rings, you should be watching two or three stocks, not twenty.
Frequently Asked Questions
What is the gap and go strategy in trading? The gap and go strategy involves buying a stock that has gapped up pre-market and continues higher once the market opens. The trade works when the gap is driven by a real, stock-specific catalyst — earnings, news, or an approval — and confirmed by above-average pre-market volume.
What causes a stock to gap up? Stocks gap up when significant news breaks between sessions — earnings beats, FDA approvals, analyst upgrades, or major contract announcements. Gaps can also be driven by sector momentum or broader market moves, though those tend to be weaker gap and go setups.
How do I find gap and go stocks before the market opens? Use a pre-market scanner filtering for Percent Change | PM ≥ 10% and Volume | PM ≥ 100,000. This narrows the field to stocks with both price movement and volume confirmation. In Scanz, this is a standard Data Scanner setup you can run from 7:00 AM ET.
How do I know if a gap will hold or fade? The strongest indicators: a stock-specific catalyst, pre-market volume well above the stock’s average, and a float small enough that demand pressure moves the price. Gaps on thin or sector-wide catalysts fade more often.
What’s the difference between a gap up and a gap and go? Every gap and go starts with a gap up, but not every gap up becomes a gap and go. The gap is the pre-market move. The “go” is the continuation through the open. The gap tells you something happened; the go tells you buyers are still in control after the bell.
Should I enter a gap and go pre-market or at the open? Most traders enter at or just after the open, once the stock confirms it’s breaking above the pre-market high with volume. Pre-market entries carry more spread risk and less confirmation. The Signal Scanner in Scanz can fire the instant a stock breaks its pre-market high at the open.
Can the gap and go strategy work for short trades? Yes — the inverse is the gap and fail: a stock gaps up, fails to hold, and reverses. The same scan logic applies, but you’re watching for the breakdown rather than the breakout.
Start a free Scanz trial and set up your pre-market gapper scan before tomorrow’s open — the Data Scanner, Signal Scanner, and News Scanner are all included. See plans and pricing. No commitment required.