Gap Trading: How to Trade Price Gaps

A price gap is an empty space on a chart where price jumps from one level to another with no trading in between, usually between a session's close and the next session's open. Gaps form when news or order imbalances push price sharply outside regular hours, and traders classify them to judge whether the move will continue or reverse.

What is a price gap?

A price gap is a discontinuity on a chart where one period's price opens well away from the previous period's close, leaving a visible empty zone. A gap up opens above the prior close; a gap down opens below it. Most gaps appear at the open, after the market has digested news or order flow while it was closed.

Gaps are a core part of price action and connect to the broader skills in our guide to how to read candlestick charts and the wider chart patterns hub. The empty space itself often becomes a meaningful level, acting as future support and resistance, which is part of why traders pay close attention to where and how gaps form.

What are the main types of gaps?

Gaps are usually grouped into four types based on where they appear and what they signal. Identifying the type, ideally after the fact rather than in the heat of the open, shapes how a trader interprets the move.

A common gap carries little signal and tends to fill. A breakaway gap breaks price out of a pattern on strong volume and can launch a sustained trend. A runaway gap appears partway through a trend, often roughly halfway, reinforcing the existing direction. An exhaustion gap is a last gasp near the end of a move, frequently followed by a reversal.

What does it mean when a gap fills?

A gap fills when price later trades back across the empty space and returns to the pre-gap level. Many traders watch for fills because an unfilled gap can act like a magnet, and a filled gap removes that pending level from the chart.

Not all gaps are equally likely to fill. Common gaps and exhaustion gaps tend to fill relatively often, since they reflect minor moves or fading momentum. Breakaway and runaway gaps that occur in strong, well-supported trends can stay open for a long time, because the trend keeps price away from the gap zone. The phrase "gaps always fill" is a myth; whether and when a gap fills depends heavily on its type and the surrounding trend.

How do you trade a gap?

There are two broad gap-trading approaches, and they sit on opposite sides of the same setup. The right one depends on the gap type, the trend, and the volume behind the move.

• Gap-and-go (continuation). When a breakaway or runaway gap shows strong volume and holds its opening range, traders may join the direction of the gap on confirmation, expecting the move to continue.
• Fade the gap (reversal). When a weak common or exhaustion gap stalls, traders may bet that price will fill the gap, entering against the gap's direction toward the pre-gap level.

In both cases, defined stops are essential because gaps tend to be volatile. A common discipline is to wait for the first few minutes or the first candle to confirm whether the gap is holding or fading, rather than committing at the open on a guess.

How do you manage gap-trading risk?

Gap risk is real because gaps often coincide with news, earnings, or other catalysts that drive fast, wide swings. A position can move far past a stop level if liquidity is thin around the open, so risk control is as much about sizing as about stop placement.

Several habits help. Trade smaller size around scheduled events like earnings, where overnight gaps are most likely. Wait for the opening range to form before committing, rather than chasing the first print. Anchor stops to structure, such as the other side of the gap or a nearby level, rather than to an arbitrary tick. And remember that a gap on heavy volume carries more conviction than one on light volume, which is more prone to fade.

Putting gap trading in context

Gap trading is a disciplined way to read sharp, news-driven moves that leave a visible footprint on the chart. Its value comes from a checklist: identifying the likely gap type, judging the trend and volume, choosing between a gap-and-go or a fade, and defining risk beyond the gap level.

If you are still learning to read sharp moves, ground yourself in support and resistance and the candle skills in how to read candlestick charts, and study how gaps relate to fair value gaps. Bullynx can also read a chart screenshot and point out where a gap sits relative to the trend, recent levels, and volume.