FVG trading: how to read a fair value gap

A fair value gap, or FVG, is a price area the market crossed without ever settling in it. Three candles, a hole in the middle, and one question worth money: will price come back to fill it? This guide explains what an FVG really is from an order book point of view, how to read one without fooling yourself, and above all how to find out whether yours actually earns you anything.

• An FVG is not a pattern, it is a trace: the mark left by an imbalance between buyers and sellers that found no counterparty.
• You read it across three candles: the hole between the first candle's upper wick and the third candle's lower wick, or the reverse.
• Not all gaps are equal: one left by an economic release and one left by a 3 a.m. liquidity hole do not behave the same way.
• Your own record is the only judge: an FVG that works for another trader tells you nothing about what it does in YOUR hands.

The fair value gap has become one of the most repeated concepts in online trading, copied from one video to the next without anyone explaining where the hole comes from. The result: plenty of traders spot FVGs correctly and get nothing out of them, because they learned the shape without the cause.

The cause is simple and mechanical. It lives in the order book, and it explains why some gaps are almost always filled while others are never revisited. That difference, not the pattern itself, is what separates a tradable signal from a drawing on a chart.

What an FVG really is: a trace, not a pattern

Most definitions stop at geometry: three candles, a gap, done. That is accurate and insufficient, because it describes the symptom without naming the disease. The hole does not appear because the chart decided to draw something. It appears because at that price level, there was nobody on the other side.

In a normal order book, every price level carries bids and offers. Price advances by consuming those orders, level by level. When buying flow arrives in size and sellers step away or are simply absent, price stops advancing level by level: it jumps. It crosses levels where almost nothing traded, because there was nothing to trade.

That jump is what the candle records, and it is why the word imbalance describes the thing better than the word gap. An FVG is not empty space on a chart, it is the scar of a moment when supply and demand stopped answering each other. If you keep one sentence from this guide, keep that one: you are not looking at a shape, you are looking at an absence of transactions.

That reading changes everything that follows. A void of transactions attracts price because the market wants to find out what would have happened there. But it only attracts price if participants have a reason to return, and that reason is not in the pattern. It is in the context.

Reading three candles, and the most common mistake

The mechanics are simple. Take three consecutive candles. In an up move, look at the first candle's upper wick and the third candle's lower wick. If the third candle's low sits above the first candle's high, the space between them is a bullish fair value gap. In a down move, invert it.

The most common mistake is not in the spotting, it is in the timeframe. An FVG read on a one minute chart and one read on a four hour chart do not tell the same story, and many traders mix the two without noticing. A one minute gap can vanish entirely inside a single hourly candle: it never existed for anyone watching hourly. Pick your timeframe before you look, not after.

A gap only exists in the timeframe you look at it. Switching charts mid-argument is switching markets without saying so.

A second, quieter mistake: counting bodies instead of wicks. Some schools only keep candle bodies, which produces wider and far more numerous zones. Both conventions are defensible, neither is wrong in itself. What is wrong is switching convention from one trade to the next depending on what suits, because then you can no longer measure anything.

Not all FVGs are equal

This is the point tutorials almost always skip, and it is the one that decides your profitability. An imbalance left by a major economic release and one left by an overnight liquidity hole look identical on the chart and behave nothing alike.

This table is not a rule to apply as is, it is a reading grid to verify on your own market and your own hours. A gap on a highly liquid currency pair and one on a thinly traded futures contract have no reason to behave the same.

The habit to build is this: before checking whether price returns, ask yourself why it left. A gap whose cause you cannot explain is a gap you cannot trade, however cleanly it is drawn.

The inverse FVG, when a gap fails

Sometimes a fair value gap gets cut straight through instead of acting as a retracement area. When a bullish gap breaks downward and price closes below it, it stops being potential support and becomes potential resistance. That is what people call an inverse FVG.

The reasoning behind it is the same as for any broken level, and there is nothing mystical about it: participants who bought inside the gap are now underwater, and some of them will look to exit at breakeven if price returns. That latent supply is why the area pushes back instead of holding.

The point of the concept is not to multiply signals, it is to avoid a common trap: stubbornly buying a gap that has already failed. A gap that has been cut through is not a gap on sale, it is a gap that changed sides.

Entering, and above all where the stop goes

There is no universal FVG entry, and being sold the opposite is the fastest way to lose money with an otherwise sound concept. Three approaches coexist, from most aggressive to most patient, and they do not carry the same risk profile.

• Entry at first touch of the edge: you get filled often, you also get run over often. Lower hit rate, but a high reward to risk when it works.
• Entry at the middle of the zone: a compromise, you let price penetrate before acting. You miss shallow returns.
• Entry after confirmed reaction: you wait for price to show it refuses to go further. Filled less often, with a wider stop.

The stop does not go somewhere under the zone at random. It goes where your reading becomes wrong, meaning beyond the point that would invalidate the very reason you entered. If you buy a gap because it marks a continuation after a break of structure, your stop goes below the point that would cancel that break, not three pips under the edge because it feels comfortable.

That distinction sounds theoretical and it is not. A stop placed for psychological comfort gets hunted, then the trade leaves without you. A stop placed at invalidation costs more when it triggers, but it only triggers when you were wrong. See also our guide on where to place your stop loss.

What an FVG does not tell you

A fair value gap gives no direction. It flags an area where the market might react, not the way it will react. Trading a gap with no prior directional bias is flipping a coin with a technical justification attached.

It gives no timetable either. A gap can be filled within the hour, within the week, or never. Traders who lose money with this concept are rarely the ones who spot it badly, they are the ones who sit in front of a zone waiting for a return that never comes, then force an entry elsewhere so the wait was not for nothing.

Finally, it does not replace structure. A gap in the direction of the dominant trend and one against it do not carry the same expectancy, and no indicator will tell you which of the two you are looking at. For that framing, see market structure and structure and liquidity, which set the context of which the gap is only a detail.

Finding out whether your FVG edge actually exists

Here is the part nobody enjoys, and the only one that counts. You can read ten guides on the fair value gap, this one included, and still not know whether the concept earns you anything. The answer is not in a tutorial, it is in your history.

What needs measuring is short. On your FVG trades: what is your hit rate, what is your average win against your average loss, and above all how do those two numbers compare to trades you took on something else. If your FVG edge matches your general edge, the concept adds nothing in particular and you can stop hunting gaps.

The split that reveals the most is by gap cause. Group your trades by the origin of the imbalance, release, session open, overnight hole, break of structure, and look at where the money is actually made. It is common to discover a single one of the four categories carries the whole result, and the other three cost you.

That is exactly what a trading journal is for: sorting your trades by context and showing you, with numbers, which of your setups deserve your capital. Until that split exists, saying you trade FVGs is a statement of intent, not a measured strategy.

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