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.

Why anyone cares

A range that was 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 are often still waiting, which is why an untouched gap frequently acts as a place where price reacts.

Frequently is not always. 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.

Questions people ask

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

No. It happens often enough to be worth watching and not often enough to be a rule. 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.

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 fair value gaps it finds, with their exact ranges and a strength for each, alongside the order blocks, the liquidity pools, the market structure and a trade plan.

Order blocks and gaps are read together, because one that lines up with the other is worth far more than 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.