Fair Value Gaps: The Three-Candle Imbalance
A fair value gap is a three-candle imbalance, the empty space between the first candle's high and the third candle's low when price moves through a range too fast to trade all of it. That is the entire construction. Three candles, one fast middle move, and a stretch of prices where no two-sided trade ever happened. The previous lesson introduced displacement as the force behind delivery. This lesson gives the imbalance displacement leaves behind its precise shape, its three stages of life, and the way traders build entries around it.
What a Fair Value Gap Actually Is
Take three consecutive candles. In a bullish gap, the high of candle one sits below the low of candle three. Candle two, the middle candle, is wide and directional, covering the ground between those two prices in a single push. The space between candle one's high and candle three's low is the gap. Nothing traded there in both directions. Buyers lifted offers so aggressively that sellers never got a chance to respond at those prices.
The bearish gap mirrors the construction exactly. Candle one's low sits above candle three's high, and the wide middle candle sells through the space between them. The zone between is untraded, one-sided delivery pointing down.
The reason the gap forms matters more than the drawing. Price moves when one side overwhelms the other. When the imbalance is extreme, the move skips prices entirely. Orders fill at 100, then at 104, and the prices between never see a matched buy and sell. Those skipped prices are the gap. It is a record of urgency.
One clarification saves a lot of confusion later. The gap is not a printed hole in the chart. The candles look continuous, and the zone hides inside the bodies and wicks: the trader has to mark it deliberately, the high of candle one, the low of candle three, and the band between.
The midpoint of the gap carries its own name. Halfway between the two boundary prices sits the consequent encroachment, the level where the zone is considered half filled. That midpoint becomes a reference for entries, stops, and the classification of how far a return into the gap has gone. Mark all three lines when marking a gap: upper boundary, midpoint, lower boundary.
Why does any of this matter for a trade? Because one-sided delivery is expensive to maintain. The side that pushed through the zone often returns to fill orders at prices it skipped, and the other side often defends the zone because it represents the last place the fast move began. The gap is a price region where unfinished business is likely. Likely, never guaranteed.
Classification: Three Ages of a Gap
Every gap moves through a life cycle, and the stage of that cycle determines what the zone can offer. Three ages cover the whole story: fresh, mitigated, inverted.
A fresh gap is untouched since the moment it formed. Price left the zone and has not returned. This is the strongest version, because the unfilled orders and the urgency that created the gap remain untested. When price finally comes back to a fresh gap, the first touch carries the most information. Traders who wait for returns into gaps prefer fresh zones for exactly this reason.
A mitigated gap has been visited. Price returned and filled part of the zone, usually down to the midpoint, the consequent encroachment, before resuming in the direction of the original delivery. The word mitigation describes the fill itself: the side that skipped those prices came back and traded some of them. A mitigated gap is weaker than a fresh one, because part of its business is done. It can still hold, but the conviction behind the trade drops with each fill.
An inverted gap is finished in its original role. Price filled the entire zone and closed through it. At that point the gap flips. A bullish gap that gets traded through and closed below starts acting as resistance on the way back up. A bearish gap closed above starts acting as support. The logic is mechanical: the side that once defended the zone lost it, and the losing side's old ground becomes the winning side's wall.
The classification is the age, and the age sets the plan. Fresh gaps justify limit orders at the boundary or midpoint. Mitigated gaps call for reduced size or confirmation before entry. Inverted gaps stop being entries in the original direction entirely and become targets or barriers for the opposite trade. Marking a gap without noting its age is half a read.
One blunt rule keeps the classification honest. A gap either held or it did not. There is no partial credit for a zone that slowed price for an hour before failing. The close decides the age.
Trading the Gap
The delivery lesson promised an entry window, and the return into a fresh gap is that window. Displacement shows where the aggressive side committed. The gap marks the prices that side skipped. The return is the second chance to join the move at the prices the first movers ignored.
Three depths of return carry three levels of conviction. The edge tap, where price touches only the near boundary and turns, is the strongest signal of continuing delivery: the other side could not even push into the zone. The midpoint tap down to the consequent encroachment is the standard entry, the one most practitioners plan around. The full fill is the weakest version of the bullish read and often the last. A full fill that holds is a trade; a full fill that closes through is no longer a trade in that direction at all.
The gap also works as a rail while the move runs. As long as price holds above a bullish gap, delivery is intact. Pullbacks that stop at or above the zone confirm the read without requiring any new information. The moment price closes through the gap, the read transfers to the other side. There is no appeal process. The close hands the zone over, and the trader either flips the plan or stands down.
Stops belong on the far side of the zone, not inside it. A stop placed at the midpoint of a gap gets hit by the very fill the trade anticipated. The invalidation point for a bullish gap trade is a close below the lower boundary, because that close is the inversion event itself. Position size follows from that distance, the same arithmetic as any other structured stop.
Gaps rarely work alone, and they do not need to. A fresh bullish gap overlapping an order block, just below a swept sell-side pool, is three independent reasons pointing the same way: the block shows where size entered, the pool shows where the fuel came from, the gap shows where delivery was too fast to trade. Confluence is the stack, and the stack separates a marked-up chart from a trade plan. A lone gap, with no pool below it and no block around it, is a drawing, not a setup.
Expect many gaps to fail. Wide-range markets print imbalances constantly, and only a fraction of them sit at locations that matter. The filter is location first, age second, depth of return third.
A Worked Example: One Gap, Three Tests
The numbers below are invented, round, and purely illustrative. Imagine an index trading near 2,400. A sweep of sell-side liquidity below a prior low triggers aggressive buying, and price displaces upward through 2,410 with a single wide candle. The candle before the displacement printed a high of 2,410. The candle after printed a low of 2,422. The bullish gap runs from 2,410 to 2,422, with its midpoint, the consequent encroachment, at 2,416. The rally carries on to 2,520 before momentum cools.
The first test comes on the pullback. Price drifts down and touches 2,416 exactly, the midpoint, then turns. Buyers step in at the consequent encroachment, the gap holds, and delivery resumes to a new high at 2,520. A trader who placed a limit order at the midpoint, with a stop below 2,410, caught the continuation with a defined invalidation.
Weeks later the second act begins. A wide-bodied sell candle drives down and closes at 2,404, through the entire gap. The zone is now inverted. The old floor is the new ceiling. On the next rally, price climbs back into the zone and stalls at 2,414, just under the midpoint, before rolling over. The gap that once offered entries now caps them.
| State | Zone or price | What it told the trader |
|---|---|---|
| Fresh gap | 2,410 to 2,422 | One-sided delivery skipped these prices; a return here is the entry window |
| Midpoint tap | 2,416 | Buyers defended the consequent encroachment; delivery is intact |
| Delivery high | 2,520 | The gap read paid; continuation confirmed the fresh-gap entry |
| Inverted close | 2,404 | A close through the entire gap flipped the zone from support to resistance |
| Resistance retest | 2,414 | The inverted zone capped the rally, confirming the flip |
Notice what the example did not require. No indicator, no oscillator, no signal beyond the three-candle construction and the closes around it. The gap supplied the entry, the invalidation, the confirmation, and the eventual exit signal in sequence. One zone carried the whole trade from birth to inversion.
Fair Value Gap Questions
Does the gap need all three candles to be distinct?
Yes, the construction requires three separate candles: the one that sets the first boundary, the wide middle candle that displaces, and the one that sets the second boundary. If candle two's own wicks fill the space, or the pattern compresses into two candles, the imbalance has no measurable zone. The strict three-candle definition is what keeps the concept objective.
Is a gap on a higher timeframe stronger?
Generally yes, because a higher-timeframe gap represents a larger and more sustained burst of one-sided delivery. A daily gap reflects days of skipped prices, while a five-minute gap can form on routine noise. Many traders use higher-timeframe gaps for direction and lower-timeframe gaps for entry timing inside them.
What is the difference between a gap and an order block?
A fair value gap marks prices that never traded two-sided, while an order block marks the candle or zone where size actually transacted before displacement. The block is where business was done; the gap is where business was skipped. The strongest setups place the two together, with the block just beyond the gap.
What happens when a gap fills completely?
A full fill followed by a close through the zone inverts the gap, flipping it from support to resistance or the reverse. A full fill that holds without a closing break is the weakest valid version of the original trade. The close decides which of the two outcomes the trader is looking at.
The three-candle gap is the smallest unit of unfinished business price leaves behind. The next lesson widens the lens to the larger stretches: the broad voids and vacuums where entire ranges went untraded, and why price so often travels back across them.