Fair Value Gaps in Crypto, Explained

What is a fair value gap?

Start with three daily candles on ETH. Candle 1 has a high of $3,000. Candle 2 is a large green candle that opens near $3,010 and closes at $3,180. Candle 3 dips to a low of $3,120 before moving on. Now look at the space between candle 1’s high ($3,000) and candle 3’s low ($3,120). Neither the candle before nor the candle after traded there. Only the big middle candle passed through, and it did so quickly.

That $3,000–$3,120 band is a bullish fair value gap. The rule is simple: when the third candle’s low is above the first candle’s high, the space between them is a bullish FVG. The middle candle is the displacement, a strong one-directional move.

A bearish FVG is the mirror image. Say candle 1 has a low of $2,900, candle 2 drops hard, and candle 3’s high is $2,780. The third candle’s high is below the first candle’s low, so $2,780–$2,900 is a bearish FVG.

Why do fair value gaps form?

Markets usually trade as a two-way auction: buyers and sellers both transact at each price, and candles overlap as price wanders. A gap appears when one side overwhelms the other. Aggressive buyers clear out the sell orders in the book faster than new sellers arrive, and price jumps until it finds supply again.

A common myth is that no trades happened inside an FVG. They did: the middle candle traded through every price in the zone. What is missing is time and two-way trade. Price spent so little time there that few participants were filled at those levels, which is why some traders call the zone an imbalance or inefficiency.

Displacement often comes from news, a liquidation cascade, a breakout from a long range or a large participant who needed to fill quickly. The gap is a footprint of urgency. It tells you something happened fast. It does not tell you who did it or whether they will defend the level.

Mitigated, unmitigated and filled FVGs

Once a gap forms, traders track what price has done to it since. Using the bullish ETH gap at $3,000–$3,120:

• Unmitigated: price has not come back into the zone since it formed. ETH is at $3,400 and has not traded below $3,120.
• Mitigated but not filled: price has traded into the zone but not through its far edge. ETH dipped to $3,060, inside the gap, and bounced.
• Filled: price has traded through the whole zone. ETH reached $3,000 or lower, so every price in the gap has now seen two-way trade.

Terms vary. Some traders call any touch “mitigated” and some say “filled” for a partial fill, so check what a chart or scanner means before you compare notes. The distinction matters because a gap that has already been tested is a different object from one that price has never revisited, as the research below shows.

Why traders watch fair value gaps

FVGs earn attention for three good reasons. They mark where price moved fastest, so they show you where the last strong push began. They are objective: two traders applying the three-candle rule will draw the same zone on the same chart and timeframe, unlike a hand-drawn trend line. And they make useful reference points for planning, both as places price might react and as targets during a pullback.

The popular claim goes further: that price is “drawn” to fill gaps and will reject from them like support or resistance. That claim is testable, and the evidence for it as a standalone signal is weak. Keep the first three reasons and treat the fourth as a hypothesis.

Daily vs weekly FVGs: when timeframes conflict

Every timeframe makes its own gaps, and they often overlap. Say BTC’s weekly chart has a bullish FVG from $50,000 to $54,000. Inside it, the daily chart shows a bearish FVG from $52,000 to $53,000, left by a sharp two-day drop. Price is rallying from $51,000 toward $52,000.

The two zones disagree. The daily bearish gap suggests sellers might lean on the rally around $52,000. The weekly bullish gap says the whole area is one where buyers previously moved price up fast. Both are true at once, on different scales.

• Label every zone with its timeframe. A weekly gap and a daily gap are not equal evidence just because they share a colour.
• When daily and weekly gaps disagree, treat it as mixed evidence. WarRoom’s study found only a modest short-term weekly tilt and no reliable rule for which timeframe wins.
• Do not merge overlapping zones into one “super zone”. Overlap is a reason to look closer, not proof of importance.
• Expect lower-timeframe gaps to be more numerous and to matter less. Intraday charts produce many gaps, and most are noise.

Do fair value gaps work? What WarRoom’s FVG study found

WarRoom tested the most common FVG idea directly: when price returns to an unmitigated gap for the first time, does it reject? The study used 3 years of daily and weekly candles on 512 symbols with at least $1 million of daily trading activity, from June 2023 to June 2026. Everything from July 2025 onward was a sealed holdout, kept aside while the method was built and examined at the end.

Each first visit was checked for a clear rejection within two candles, and the first-touch results were checked against comparison periods. These are the holdout results.

Roughly four out of five first visits did not produce a clear rejection, and the first-touch rejection rate did not beat the comparison periods. On this evidence, an untested FVG is not a better place to expect a reversal than an ordinary moment.

The rejections that did happen did not lead anywhere useful either. A 95% interval is the range the true average plausibly sits in. Moves are measured in the direction of the rejection, so a negative number means price drifted slightly against it. On daily gaps the average move two candles later was −0.34%, with the whole interval below zero. On weekly gaps the interval runs from −0.82% to +4.78%, so wide that it includes losses, gains and zero.

Mitigated-but-unfilled gaps rejected more often: 40.0% on daily and 33.6% on weekly. That looks like an edge, but it comes from survivorship. Those gaps had already survived one test, so they were selected for holding. You only know a gap is mitigated but unfilled after it has held, which is exactly the information you lack at the first touch.

The plain conclusion: FVGs are a map of where price moved fast, not a standalone entry or forecast. That is why the study carries the status descriptive.

How to use FVGs as a map with other evidence

If FVGs are not signals, they are still useful as locations. The job is to decide in advance what you will look for when price arrives.

1. Mark the zones with their timeframes, and note whether each is unmitigated, mitigated or filled.
2. When price reaches a zone, watch the order flow inside it. Cumulative volume delta (CVD), the running total of aggressive buying minus aggressive selling, shows whether selling is being absorbed with little price progress or whether price slides through easily.
3. Check whether spot and perpetual flow agree, and whether open interest (OI), the number of open futures contracts, is building or flushing as price enters the zone.
4. Look for other reasons the area matters: a prior range high or low, a heavy volume node or resting limit orders.
5. Decide your invalidation before acting. For a bullish gap, a close below the bottom edge means the zone has been filled and the idea is over.

A gap with absorption, agreeing spot flow and another structural reason inside it is a better-evidenced location than a bare rectangle. It is still only a location.

Limitations

FVGs depend on the candles you draw them from. A different timeframe, a different exchange or a chart with a different daily close time can move or remove a gap. Thin markets create gaps from single large orders that mean little.

The study above covers daily and weekly candles on liquid symbols in one period. It does not tell you how gaps behave on intraday charts, on very small coins or in future market conditions, and a missing edge in a first-touch test does not prove gaps are useless in every combination with other evidence.

Popularity cuts both ways. Because many traders watch the same zones, stops and orders cluster around them, which can produce sharp moves through a gap as easily as reactions at it.

How to see this in WarRoom

WarRoom charts draw fair value gap zones alongside perpetual and spot volume, CVD and an open-interest overlay, so you can watch the flow when price revisits a gap. Select a revisit with the X-Ray tool to see the order-flow and market-structure evidence for that range. The Scout includes a Fair Value Gaps preset, and its research record, with the study above, is published on /research.