What Is a Fair Value Gap? A Plain-English Guide
A fair value gap (FVG) is a three-candle gap on a chart: price moves so fast that the first candle's wick and the third candle's wick never overlap, leaving an unfilled zone in between. Traders call that zone an imbalance and watch it because price often returns to it before continuing.
If you trade Smart Money Concepts (SMC), the structure-based approach built on order blocks and liquidity, you have seen the term fair value gap everywhere. Most of what explains it is a video with dramatic music, not a plain written reference you can scan. This guide is that reference: what an FVG is, how it forms, how to spot one in about ten seconds, and the honest limits of trading it.
No "$500 a day" screenshots. Just the three-candle rule, a marked chart, and where a fair value gap actually helps.
What is a fair value gap?
A fair value gap is the unfilled space left between the wicks of the first and third candle in a three-candle move. When a large middle candle pushes price hard in one direction, the candle before it and the candle after it do not "reach back" far enough to overlap. The gap between their wicks is the FVG — a small area the market skipped past.
It is one specific type of imbalance (a one-sided, inefficient move where one side clearly overpowered the other). The idea comes from Inner Circle Trader (ICT) methodology and is now a core building block across SMC. The label sounds technical, but the pattern is just: fast move, wicks do not overlap, gap left behind.
The three-candle pattern (plain English)
Look at any three candles in a row. Candle 1 on the left, a strong candle 2 in the middle, candle 3 on the right. For a bullish FVG, check whether candle 1's high sits below candle 3's low. If there is clear air between them, that air is the gap. For a bearish FVG, it flips: candle 1's low sits above candle 3's high.
How does a fair value gap form?
An FVG forms when momentum is so one-sided that price has no time to trade back through a level. A big middle candle carries price far in a single bar, often on a news spike or a session open. The neighbouring candles print their wicks, but those wicks stop short of each other, and the skipped area is left "unpriced" on the way through.
That skipped area is why traders treat an FVG as meaningful. The market moved through it without letting both buyers and sellers transact there. Many traders expect price to revisit that zone later to "rebalance," letting trades happen at the prices that were skipped, which is why an FVG becomes a zone of interest rather than just a gap.
Bullish vs bearish fair value gap
Same three-candle rule, opposite direction. A bullish fair value gap forms during a strong up-move and sits below current price, where it can act as potential support on a pullback. A bearish fair value gap forms during a strong down-move and sits above price, where it can act as potential resistance. In both cases the gap is the space between the first and third candle's wicks — you are just measuring it up or down.
The direction matters for how you use it: a bullish FVG is a spot you might watch for longs on a return; a bearish FVG is a spot you might watch for shorts. The pattern is identical — only which side of price it sits on changes.
How to spot a fair value gap on a chart
You can find an FVG in about ten seconds once you know the rule. The test is purely mechanical: three candles, do the outer wicks overlap or not.
- Find a strong, decisive candle — the "middle" candle of your three. It should stand out from the candles around it.
- Look at the candle before it and the candle after it.
- For a bullish move: check if the high of candle 1 is below the low of candle 3. If there is a gap between them, that gap is a bullish FVG.
- For a bearish move: check if the low of candle 1 is above the high of candle 3. If so, that gap is a bearish FVG.
- Mark the zone from wick to wick. That rectangle is the fair value gap you will watch.
- Note that the gap is only final once candle 3 closes — before the close it can still change.
That last step matters. A gap measured on a live, unclosed candle can shift tick by tick; a gap confirmed on candle 3's close is fixed. This is where a non-repaint tool helps — it only draws the FVG once the candle closes, so the zone you study is the zone that was actually there.
Do fair value gaps get filled?
Often, but not always, and never on a schedule. Price returns to many fair value gaps because the market tends to revisit skipped areas to rebalance. But plenty of FVGs stay open for a long time, or never fill at all, especially when a strong trend keeps running. Treat a fill as a tendency, not a rule.
For a deeper, stats-backed look at how often gaps actually fill, see our honest breakdown in do fair value gaps get filled?.
Fair value gap vs imbalance vs order block
These three get mixed up constantly. They are related, but not the same thing. An imbalance is the broad concept; a fair value gap is the specific three-candle way SMC traders draw one; an order block is a different object entirely (a candle-based zone), though it often sits right next to an FVG.
| Concept | What it is | How it's marked |
|---|---|---|
| Imbalance | The general idea of a one-sided, inefficient move | Any area price passed too quickly — no fixed rule |
| Fair value gap (FVG) | The specific three-candle version of an imbalance | Gap between candle 1's wick and candle 3's wick |
| Order block | The last opposite candle before a strong move | The body/range of that candle, projected forward |
The practical link: a valid order block usually has an FVG right after it. The order block is where the move began; the fair value gap is the inefficiency that move left behind. Many SMC entries line the two up — a return into an order block that also fills a fair value gap is a higher-confluence zone than either alone. For the companion piece, see bullish vs bearish order block.
How SMCZone marks fair value gaps
Marking every FVG by hand is slow and subjective — two traders often draw the same three candles slightly differently. SMC ToolBox auto-detects fair value gaps (and related POIs like single-candle blocks) directly on your chart, and it does so non-repaint by code: the gap is finalized on candle close and never redrawn afterward. So the FVG you review tonight is the one that was actually there when the candle closed. That keeps your backtesting and journaling honest.
FAQ
What is a fair value gap in simple terms?
It is a gap left on the chart when price moves so fast across three candles that the first candle's wick and the third candle's wick do not overlap. That unfilled area is the fair value gap — a spot price often returns to before continuing.
How does a fair value gap form?
A strong middle candle pushes price far enough that the wicks of the candles on either side leave a gap between them. That gap marks an imbalance — an area passed too quickly for buyers and sellers to trade fairly.
What is the difference between a bullish and a bearish fair value gap?
A bullish FVG forms on a strong up-move and sits below price as potential support; a bearish FVG forms on a strong down-move and sits above price as potential resistance. The three-candle rule is the same, only the direction flips.
Do fair value gaps always get filled?
No. Price returns to many FVGs, but not all, and not on a fixed schedule. Treat an FVG as a zone of interest, not a guarantee — it tells you where price might react, not that it must.
Is a fair value gap the same as an imbalance?
They overlap. 'Imbalance' is the general idea of a one-sided, inefficient move; a fair value gap is the specific three-candle version SMC traders mark. Every FVG is an imbalance, but not every imbalance is drawn as an FVG.
Frequently asked questions
What is a fair value gap in simple terms?
It is a gap left on the chart when price moves so fast across three candles that the first candle's wick and the third candle's wick do not overlap. That unfilled area is the fair value gap — a spot price often returns to before continuing.
How does a fair value gap form?
A strong middle candle pushes price far enough that the wicks of the candles on either side leave a gap between them. That gap marks an imbalance — an area passed too quickly for buyers and sellers to trade fairly.
What is the difference between a bullish and a bearish fair value gap?
A bullish FVG forms on a strong up-move and sits below price as potential support; a bearish FVG forms on a strong down-move and sits above price as potential resistance. The three-candle rule is the same, only the direction flips.
Do fair value gaps always get filled?
No. Price returns to many FVGs, but not all, and not on a fixed schedule. Treat an FVG as a zone of interest, not a guarantee — it tells you where price might react, not that it must.
Is a fair value gap the same as an imbalance?
They overlap. 'Imbalance' is the general idea of a one-sided, inefficient move; a fair value gap is the specific three-candle version SMC traders mark. Every FVG is an imbalance, but not every imbalance is drawn as an FVG.