Gap and go
Gap and go is a day-trading setup in which a stock opens well above the previous day's close, usually on news, and keeps rising after the open instead of falling back to fill the gap. Traders look to buy as it breaks the high of the pre-market or of the first candles after the opening bell.
Why it matters to a small-cap momentum trader
It is one of the core morning setups because most of the work happens before the bell. The gap scanner lists the stocks up the most since yesterday's close, and the trader narrows them down by catalyst, float and relative volume. The strongest candidates tend to have fresh news, a low float and heavy pre-market volume. The risk is the gap fill: a stock that cannot hold its pre-market levels at the open can give back the whole gap quickly.
How it is measured and traded
Gap = the current price divided by the previous day's close, minus 1. Before 9:30 the current price is the latest pre-market trade.
A common plan. Mark the pre-market high. Buy the break of it near or after the open, with a stop under a nearby low, such as the low of the first pullback. If the stock loses VWAP or falls back into the gap, the setup has failed.
There is no rule behind gap and go, only a plan, and every trader sets their own thresholds.
Gap and go in Hindsight Markets
The gappers scanner comes ready, and its gap column works before the bell too, measured from the previous day's official close. Start a replay at 4:00 a.m. and watch the gappers form, or start at the 9:30 bell and see how the open treats them.
A worked example: measuring the gap and sizing the trade
An illustration with made-up numbers, not a real stock or a real day.
The gap. Yesterday's close was 2.00. At 8:30 a.m. the stock trades at 2.90 on news. Gap = 2.90 ÷ 2.00 − 1 = 0.45, a 45% gap.
The levels. The pre-market high is 3.10. After the open the stock dips to 2.92, holds, and turns back up.
The plan. Buy the break of the pre-market high at 3.11, with a stop just under the pullback low at 2.91. The risk is 0.20 a share. To risk no more than 100 dollars, the size is 100 ÷ 0.20 = 500 shares.
The failure. A full gap fill would take the stock back to 2.00, so the stop has to be honoured long before that.
Common mistakes small-cap traders make with gap and go
- Buying the open with no level. The first minute is the most volatile of the day. Without a level to buy over and a level to stop under, there is no plan.
- Trading a gap with no news. A gap with no catalyst and light volume often fades as soon as regular-hours sellers arrive.
- Ignoring the pre-market spread. A wide spread before 9:30 makes the entry and the stop cost more than the chart suggests.
- Holding a failed open. When the stock loses VWAP or drops back into the gap, the setup has failed. Waiting for it to come back is how one loss becomes a large one.
- Watching too many gappers. A list of fifteen at 9:29 means none of them is watched properly. Most traders narrow it to two or three.
Common questions
- What is a gap up in stocks?
- A gap up is when a stock trades above the previous day's close with no trading in between, usually because news came out after the close or before the open. On a chart it leaves an empty space between yesterday's candle and today's.
- Do gaps always fill?
- No. Some gaps fill the same day, some take weeks, and some never fill. Treat a gap fill as one possible outcome, not a rule.
- How do you find gap and go stocks?
- Run a gap scanner in the pre-market, then filter by news, float, price and pre-market volume. The strongest candidates usually have fresh news, a low float and heavy volume before the bell.
- How big does a gap need to be?
- There is no rule. Gap scanners set a minimum, often a few percent, and small-cap momentum traders usually look for far bigger gaps. The Top Gappers scan in Hindsight Markets starts at 5%.
- What is the difference between gap and go and a gap fill trade?
- They are opposite bets. Gap and go buys the stock to keep going in the direction of the gap. A gap fill trade bets it will reverse back toward yesterday's close.
How to practise it in Hindsight Markets
- Open a past day at Pre-market 04:00.
- Run Top Gappers or Small Cap Top Gappers. The PM gap % column follows the pre-market price, and PM vol shows how much has traded before the bell.
- Add the Float and News today columns, then read the headline in the News panel.
- Draw a line at the pre-market high, or set a price alert on it.
- Before 9:30 trade with limit orders; market orders and stops are refused until the bell. Trade the break at the open, then check the journal's What if rows to see how other exits would have paid.
Practice this on a real past day in Hindsight Markets
Start a real past day at 4:00 a.m., build your watchlist from the gappers, and trade the open with simulated money.