Fair Value Gap: How to Mark, Read and Trade It

A fair value gap is a three-candle pattern in which the price ranges of the first and third candles do not overlap, leaving an interval between them. Traders mark that zone and watch whether price comes back to it, expecting a reaction when it does. The idea comes from the smart money concepts taught by the educator known as ICT, not from classical technical analysis, and there is no single official definition. This guide gives a precise rule you can apply and check, shows how to mark and use the zone, and explains where the idea is weak so you can judge it before you trade it.

What a fair value gap is

Take three consecutive completed candles. The middle candle is usually large and moves strongly in one direction. If the full price ranges of the first and third candles do not overlap, the interval between them is called a fair value gap. The middle candle may have crossed this interval more than once, and the pattern does not show the price path inside a candle or the orders behind it. Imbalance and inefficiency are other names for the same idea.

• Bullish fair value gap: the low of the third candle is above the high of the first candle. The gap is the zone between the high of candle 1 and the low of candle 3.
• Bearish fair value gap: the high of the third candle is below the low of the first candle. The gap is the zone between the high of candle 3 and the low of candle 1.

This is not the same as the price gap you see on a daily stock chart, where a share opens above or below the previous close after the market has been shut overnight. In markets that trade almost around the clock, such as forex, the open of one candle is usually close to the close of the previous one, and the fair value gap sits inside the three-candle sequence and not between two candles.

Why traders watch the zone

The reasoning goes like this. Within this framework, a strong, fast move is read as an imbalance between buying and selling pressure, and the market is seen as having spent little time trading in that zone. The candles alone cannot establish that explanation. Traders who hold this view expect price to return later to trade through the zone more evenly, which is described as filling, mitigating or rebalancing the gap. When it returns, they look for buyers to defend a bullish gap or sellers to defend a bearish one.

This is an interpretation and not a law of markets, and this guide gives no evidence that the method earns a profit after costs. Plenty of gaps are never revisited, particularly in strong trends, and price sometimes passes straight through a zone that traders were watching. The method is discretionary, and the results depend heavily on who draws the zones and when. Keep that in mind when you read claims about how often gaps get filled.

How to mark a fair value gap

1. Find a strong candle. Look for a large candle whose body is clearly bigger than the recent average, often after a break of a recent high or low.
2. Compare the neighbours. Wait for the third candle to close, because its high and low can still change. Check the high of the candle before it with the low of the candle after it for a bullish move, or the low of the candle before with the high of the candle after for a bearish one. If the shadows overlap, there is no gap.
3. Draw the zone. Draw a rectangle between the two edges that mark the gap, starting at the first candle and extending to the right.
4. Filter by size. Ignore very small gaps. A simple rule is to require a minimum size, for example a fraction of the average true range, so that every tiny gap does not turn into a signal.
5. Track it. Keep the zone on the chart until price trades through it, then remove it or mark it as filled.

Platforms such as MetaTrader 5 do not include a fair value gap indicator in their standard set, so traders draw rectangles by hand or load a custom indicator. If you use a custom indicator, compare what it marks with the rule above on a few charts. Settings and definitions differ between authors.

What counts as filled

There is no common standard here either, so choose one and keep it:

• Touched. Price enters the zone at all.
• Half filled. Price reaches the midpoint of the zone. Many traders watch this level because it splits the zone evenly.
• Fully filled. Price trades through the whole zone, or a candle closes beyond the far edge.

Using the zone

Traders use fair value gaps in three main ways.

As an entry zone

In an uptrend, a trader waits for price to pull back into a bullish gap and looks for a sign that buyers are active there, for example a bullish candle that closes back above the midpoint. In a downtrend the same idea applies in reverse with bearish gaps. Some approaches wait for a confirming candle before entering, and others place a limit order inside the zone, as in the example below. Either way the gap is a place to look for an entry and not a signal on its own, and buying every touch of a bullish gap means taking a loss each time a gap fails.

As a target

When price moves away from an unfilled gap, the gap can serve as a target for a trade in the opposite direction, because many traders expect price to return to it. This use is also not guaranteed. It is a possible target under the rules of traders who use these gaps, and the pattern does not show how many other participants are watching it.

Inverse fair value gaps

If price closes through a gap in the wrong direction, for example a candle closes below the lower edge of a bullish gap, some traders treat the zone as having changed its role. The old support zone becomes a possible resistance zone, and it is then called an inverse fair value gap. The logic is the same as for any support level that breaks and is retested from the other side.

The prices are made up to show the arithmetic and are not a real setup. A real plan would also check that the higher timeframe supports the direction and place the stop where the idea would be proven wrong. The example shows arithmetic and is not evidence that the setup has a profitable edge. The risk and reward calculator and the position size calculator turn the distances into a ratio and a position size.

Timeframes

Fair value gaps appear on every timeframe. How often they form and how large they are depends on the instrument, the volatility and the detection rules. On a five-minute chart small gaps can be outweighed by the spread. Gaps on four-hour and daily charts are rarer and larger, and some traders mark them as major zones, but a longer timeframe does not make a signal more reliable by itself. A common approach is to take the direction and the large zones from a higher timeframe and to look for an entry on a lower one when price reaches the zone.

How it relates to other concepts

• Supply and demand zones. A supply or demand zone is drawn around the base where a strong move started, and the zone is usually a few candles wide. A fair value gap is a stricter, three-candle definition of an imbalance inside such a move. The two can overlap. The guide to supply and demand zones covers the broader idea.
• Order blocks. An order block is the last opposite candle before a strong move. The fair value gap often sits just above it in a bullish move. Traders who use both look for a gap that sits next to a block.
• Market structure. Some traders prioritise gaps formed during a break of a recent swing high or low. Such a break does not prove a lasting change in market direction.
• Engulfing candles. An engulfing candle can be the middle candle of a fair value gap, but only if the third candle also leaves the range of the first candle behind. The engulfing pattern guide shows how to read that candle on its own.

Limits and common mistakes

• Hindsight bias. On a finished chart, the gaps that worked look obvious and the many that did not are easy to ignore. Scroll back, mark every gap by your rule, and count the failures as well.
• Marking everything. A chart covered in boxes gives no information. Use a size filter and a trend filter.
• Treating the zone as a guarantee. It is an area where you look for evidence, nothing more.
• Entering without a stop. Gaps can fail, and without a stop a failed idea can turn into a large loss. A stop order is also not a guaranteed fill at the requested price.
• Mixing definitions. Authors and indicators use different rules for what counts as a gap and as filled. Pick one and apply it to every chart.
• Ignoring costs and news. The spread eats small gaps, and a data release can drive price straight through any zone.

How to practise before risking money

1. Write the rule: the three-candle test, the minimum size, the trend filter and the definition of filled.
2. Mark every gap that fits on one market and timeframe, over a long stretch of history, including those that were never revisited.
3. Record how often price returned, how often it reacted, and how far it went, in multiples of the risk.
4. Repeat in real time on a demo account and keep a trading journal.

When you trade a live account, spreads and execution change the result, so the choice of broker matters. The broker toplists and the broker reviews compare costs, regulation and platforms, and the broker matcher narrows the choice to your own requirements.

Risk management

A fair value gap tells you where to look, not how much to risk. Decide the share of the account you are willing to lose on a trade, place the stop where the idea fails, and size the position from the distance to the stop. The risk management guide explains how, and the guide to trading psychology covers the behaviour that makes traders chase gaps after a loss.

Frequently asked questions