What is a fair value gap?

How to spot one, in three candles

Take any three candles in a row and look only at their wicks.

• For a bullish gap: the low of the third candle sits above the high of the first. The untouched space between those two levels is the gap.
• For a bearish gap: the high of the third candle sits below the low of the first. Again, the space between them is the gap.
• If the wicks overlap at all, there is no gap. That is the whole test.

A fair value gap is not a hole in the chart. Price did travel through that range. What it did not do is trade there in both directions, and that is the entire point.

The middle candle is the one that did the work. It moved so quickly that the market skipped a whole range instead of trading through it patiently. That is why the same idea is also called an imbalance.

Displacement: the move that leaves the gap behind

Displacement is the name traders give to the move that creates a gap: one or a few large candles with full bodies and small wicks, covering a lot of ground in very little time. In ICT material it often comes right after price takes out a recent high or low.

It is the reason the middle candle matters. A slow, overlapping drift rarely leaves a gap, and the few it leaves are small. A gap left by displacement shows that one side overwhelmed the other for a moment, which is why traders watch the range.

No threshold makes a move count as displacement. Some traders compare the candle with the average range of the last bars, others look for bodies far larger than the ones around them. Pick one test, write it down and apply it the same way every time, or every move you like will look like displacement after the fact.

Why anyone cares

The idea is that a range crossed in one move contains orders that never got filled. Buyers who wanted in lower, sellers who wanted out higher: they were all left behind. When price comes back, those orders would still be waiting, which is why traders treat an untouched gap as a place where price may react.

No published study has measured how often that happens. A fair value gap is a zone of interest, not a prediction. Plenty of them are never revisited, and plenty are crossed again without the slightest pause.

Most fair value gaps are not worth trading

This is the part that separates a useful read from a chart covered in boxes. Five things decide whether a gap deserves attention.

• Size. A gap two pips wide on a one-minute chart is noise. A gap that spans a meaningful part of the recent range is not.
• Timeframe. A gap on a four-hour chart carries far more weight than the same shape on a one-minute chart, because far more money had to move to create it.
• Direction. A gap that sits with the prevailing trend is a very different proposition from one that sits against it.
• Whether it is still open. Once price has traded back through the range, the imbalance is gone. The box on your chart is history, not a level.
• What else is there. A gap that lines up with an order block, a liquidity pool or a prior high is worth more than a gap sitting alone in empty space.

The mistakes that cost the most

• Treating every gap as a signal. On a low timeframe you will find dozens a day. Almost none of them matter.
• Forgetting the gap can stay open forever. There is no rule that says price must come back.
• Marking a gap that has already been filled. If price has traded through it, the imbalance no longer exists.
• Using it alone. A fair value gap tells you where an imbalance is. It tells you nothing about whether the market wants to go there.

How much of it has to fill

A gap is a range, not a line, so price coming back into it raises a question the three-candle test never answers: how far in counts as a touch? Traders answer it three different ways, and the answer changes the trade more than the gap does.

• The near edge. The first price of the range. Price reacting there means the shallowest entry and the largest number of trades that never fill.
• The midpoint. Half of the range, the level some call consequent encroachment. It is a convention, not a law, and it is the one most people default to because it sits between the two extremes.
• The far edge. A full fill. The imbalance is gone by definition, so anything traded here is traded on something other than the gap.

None of the three is correct in the way a measurement is correct. What matters is that the choice is made before the chart is in front of you, because a rule chosen afterwards will always be the one that made the last trade look right.

When a gap flips

A gap that price cuts straight through, without pausing, has not simply stopped existing. Traders watch the same range afterwards from the other side, and the name for that is an inverse fair value gap.

The logic is the same logic as a support that becomes resistance. Everyone who treated the range as a floor and was wrong is now sitting in a losing position inside it, and the first return is where a good number of them get out. That is the explanation traders give; who is actually getting out never shows on a chart, whatever three-word name it gets.

The practical test is the close, not the wick. A candle that closes cleanly beyond the far edge of the gap is the event that flips it. Price poking through and closing back inside is price testing the gap, which is the opposite of breaking it.

Where the entry and the stop go

The gap gives the entry, and the structure around it gives the stop. Putting both inside the gap is the most common way to turn a correct read into a small, avoidable loss.

• The entry is your chosen depth. Near edge, midpoint or full fill, decided in advance, applied every time.
• The stop belongs beyond the candle that created the gap. Not beyond the gap, and not beyond the entry. If price runs past the whole move that produced the imbalance, the reason for the trade is gone.
• A gap on its own rarely justifies the risk. The gaps worth taking are the ones that sit inside an order block, at the edge of a range, or in front of a pool of stops.

A gap on a higher timeframe usually offers a wider stop and a slower trade; a gap on a lower one offers a tighter stop and more of them. The two are different trades with the same name, and sizing them the same way is how the account learns the difference the hard way.

The unfilled orders story, examined

The usual explanation is that a gap contains orders that never got filled, still resting, waiting for price to come back. It is a satisfying story and it is not something a chart can show. A chart shows where price went and, on some markets, how much traded. It does not show what is resting in the book, and the resting book changes by the second anyway.

There is a weaker claim that survives the scrutiny, and it is enough. A gap marks a range the market crossed without negotiating, which means whatever agreement usually forms between buyers and sellers never formed there. That is visible, it is repeatable, and it is the same on every chart anyone is looking at. Add the fact that a large number of traders mark the same three candles the same way, and you have a level that gets attention for reasons you can actually name.

The difference matters when the trade fails. If the gap was a place where a reaction was more likely, a failure is a normal outcome. If the gap was a room full of waiting institutional orders, a failure has to be explained away, and explaining away losses is how a method stops improving.

Questions people ask

Does price always come back to fill a fair value gap?

No. No published study has measured how often it happens, so any percentage you see is a claim, not a finding. Anyone who tells you otherwise is selling something.

Is a fair value gap the same thing as an imbalance?

In practice, yes. Different traders use different names for the same three-candle pattern. Imbalance is the older word, fair value gap is the one that spread with intraday trading education.

Is it the same as an opening gap?

No, and confusing the two is common. An opening gap is a break in the price series itself, when a market closes at one price and opens at another. A fair value gap has no break: every price traded, just not in both directions.

What is an inverse fair value gap?

A gap that price closed through and that is now watched from the other side. A bullish gap that fails becomes a place sellers defend, and the reverse. The three candles are unchanged; what changed is that price rejected the range instead of respecting it.

Does a gap have to be filled completely?

No, and deciding in advance how deep a fill you require is more useful than the answer. The near edge and the midpoint are the two usual choices. A complete fill removes the imbalance, so a trade taken after one is a trade taken on something else.

Which timeframe should I look at?

The one you actually trade, with the one above it for context. A gap that matters on a daily chart is invisible on a one-minute chart, and the reverse is even more true.

Reading gaps without drawing them by hand

Trading AI reads a photo or a screenshot of any chart and returns the market structure, the key levels and a full trade plan with its risk.

Order blocks and gaps are read together, because traders rate one that lines up with the other above either alone: What is an order block?

The other kind of gap, the one where nothing traded at all: What is an opening gap?

If any of this is new, start from the beginning: How to read a candlestick chart.

All of these ideas belong to one framework, and it is worth seeing it whole: Smart money concepts, explained plainly

This page is educational. It is not financial advice, and nothing here is a recommendation to buy or sell anything.