What Is a Gap in Trading and How to Trade Gaps

A gap is a price level on a chart where no trading occurred, creating a visible space between two consecutive candles. Gaps happen when the opening price of one session is significantly different from the closing price of the previous session. They signal that something changed while the market was closed — news, earnings, or overnight sentiment — and the market repriced accordingly.

Types of Gaps

Gap up: The new candle opens above the previous candle's high. There is empty space between them. This signals bullish sentiment — demand pushed price higher before anyone could trade at intermediate prices.

Gap down: The new candle opens below the previous candle's low. Empty space appears below. This signals bearish sentiment — selling pressure pushed price lower overnight.

The size of the gap matters. A ten-cent gap on a $200 stock is noise. A five-dollar gap on the same stock is significant. Measure the gap relative to the instrument's average range and price.

Common Gap vs True Gap

A common gap occurs within a range and has little significance. It fills quickly as price returns to normal range-bound behavior. These gaps happen frequently and offer limited trading value.

A breakaway gap occurs at the start of a new trend. Price gaps above resistance or below support, breaking free from a consolidation. Breakaway gaps often do not fill because the move is backed by a genuine shift in sentiment.

A runaway gap (also called a continuation gap) occurs within an existing trend. It signals that the trend is accelerating. Participants who missed the move are jumping in, causing price to skip levels.

Gaps represent price levels that the market refused to trade at. Whether the gap fills depends on why it formed — common gaps fill quickly, breakaway gaps often never fill.

An exhaustion gap occurs near the end of a trend. Price gaps in the trend direction one final time before reversing. This gap usually fills quickly as the trend runs out of energy.

The Gap Fill Concept

Many traders focus on gap fills — the tendency of price to return to the gap area and "fill" it by trading at the prices that were skipped. Gap fills are common but not guaranteed.

Statistics vary by instrument, but a majority of gaps eventually fill. The question is when. A gap might fill within hours, or it might take weeks. Short-term gap fill strategies work best on common gaps within a range. Breakaway gaps can remain unfilled for months.

Trading the gap fill: when a stock gaps up at the open, some traders wait for price to pull back and fill the gap, then enter long at the fill level. The theory is that the fill completes the price action, and the original bullish sentiment resumes.

Trading Gap Ups

Gap and go: When a stock gaps up above resistance on high volume, it may continue running. Enter long if the first few minutes of price action are bullish — holding above the opening price with buyers stepping in. Stop below the opening price.

Gap and fill: When a stock gaps up but immediately starts selling off, wait for the gap to fill. If price fills the gap and then bounces (showing support at the pre-gap close), enter long. Stop below the fill level.

Gap and fail: If the stock gaps up and sells off through the fill level on heavy volume, the gap was a false signal. This is actually a shorting opportunity — the failed gap creates trapped longs who are now selling.

Trading Gap Downs

The strategies mirror gap up trades. A gap down through support on volume can be a breakaway gap signaling a new downtrend. A gap down that fills quickly shows the selling was overdone and a bounce is likely.

Gap down plays at the open are particularly volatile. Panic selling can create oversold conditions quickly, and the snap-back rally when fear subsides can be dramatic. These are high-risk, high-reward setups that require strict risk management.

Gaps in Smart Money Concepts

In SMC terms, gaps are related to fair value gaps and volume imbalances. A fair value gap on a candlestick chart is a three-candle pattern that shares the same underlying concept — price moved too fast and left unfilled orders behind.

The key difference is that traditional gaps occur between sessions (overnight), while fair value gaps occur within sessions (intraday price action). Both represent imbalances that price tends to revisit.

Risk Management for Gap Trades

Gaps create volatility, and volatility requires wider stops. A stock that gaps five dollars may swing two or three dollars in the first thirty minutes. Size your position accordingly — tight stops on gap trades will get triggered by normal volatility.

Wait for the first fifteen minutes of price action to settle before making decisions. The opening rotation after a gap is chaotic and driven by emotional orders. Let the dust settle before committing.