Trading Gaps: Magnets, Inversions, and Why Context Still Rules

A gap is a stretch of price where one side never got to argue. The week opens away from Friday's close, or a violent candle sequence leaves a window where almost nothing traded — either way, the market skipped a region without building the usual two-way business inside it. That skipped region matters later, because untraded prices are unfinished prices. But 'gaps get filled' is a half-truth that costs money when quoted whole: some gaps are destinations, some are launchpads, and the gap itself never tells you which.

Two species of gap

• Opening gaps: the day or week opens away from the prior close — weekend news, an overnight repricing. These are visible to everyone, sit at reference levels everyone watches, and carry a well-known statistical lean toward being revisited.
• Inefficiency gaps: a window left inside a fast displacement, where a candle's range barely overlaps its neighbors. No calendar event required — just price moving too fast for both sides to participate. These form the mid-leg 'unfinished business' that later acts as a magnet or a shelf.

The pull toward filling is real but it is a tendency, not an appointment. Common gaps inside a range close quickly because nothing changed — the open was noise and price drifts back to where the business is. But a gap created by genuine repricing can stay open for weeks, because going back would mean unwinding a decision the market actually meant. The fill statistic averages both species together; your trade lives in only one of them.

Gap as target, gap as floor

The same object plays two opposite roles depending on which side price approaches it from and what the higher timeframe wants. When your narrative points toward the gap — price trading back into old inefficiency with liquidity resting beyond it — the gap is a take-profit zone: a sensible place to be paying yourself as the unfinished business completes. When price trades through a gap and then returns to it from the other side, the gap often inverts: the region that was a magnet becomes support or resistance, because the traders who repriced through it defend it on the retest. An inverted gap holding is information — the displacement was meant. An inverted gap failing is information too — the move that created it is being taken back, and you want to be out, not averaging in.

Context first, gap second

The losing version of gap trading is fading every open on reflex: short every gap up, long every gap down, because 'gaps fill'. That's not a strategy, it's a slogan with a position size. A gap trade needs the same one-sentence narrative as any other entry: where is price in the higher-timeframe range, which pool of liquidity is the likely draw, and does the gap sit on the path or against it? A Monday gap down into last week's low with equal lows resting just beneath is a very different short than the same-sized gap down in the middle of nowhere. The gap adds a level to the story. It does not replace the story.

Updated 2026-08-22