Learn › Smart Money & Liquidity › Fair Value Gaps

Fair Value Gaps (FVG) Explained Simply

EDUCATION  Plain-English, hype-free. No signals, no promises — just the reading skill itself.

Open almost any trading feed and you'll see charts wallpapered with little shaded rectangles labelled "FVG." The fair value gap is one of the most popular ideas to come out of the ICT / smart-money vocabulary — and one of the most misused. Strip away the mystique and an FVG is something refreshingly simple: a three-candle window that marks where price moved so fast it left a thin, one-sided zone behind. This guide covers what that actually means, when a gap is worth marking, what the 50% convention is, and — honestly — what the concept can and cannot do for you.

What a fair value gap actually is: the three-candle window

Take any three consecutive candles. In a bullish fair value gap, the middle candle (candle 2) expands upward so aggressively that the low of candle 3 never overlaps the high of candle 1. The space between those two levels — candle 1's high and candle 3's low — is the gap. Only candle 2's range covers it, which means price traded through that zone exactly once, in one direction, in a hurry.

A bearish fair value gap is the mirror image: candle 2 expands downward, and the gap sits between candle 1's low and candle 3's high.

The smart-money narrative calls this an "imbalance" or "inefficiency" — the story being that buyers and sellers never got a fair two-sided auction in that zone. That's a useful mental model, but mechanically an FVG is just a footprint: evidence that one side overwhelmed the other for a moment and price didn't pause to negotiate. No hidden algorithm is required for the definition to be true — it's plain geometry you can verify on any chart.

Why the gap "wants" to fill — the honest version

The popular story goes like this: markets seek fair value, so price must come back to "rebalance" the inefficiency before continuing. Said that confidently, it sounds like physics. It isn't.

Here's the honest version. Markets are two-way auctions, and trends don't move in straight lines — they pull back. When a market displaces upward and then pulls back, that pullback will, by construction, often re-enter the zone the impulse just left behind, because that zone is directly beneath current price. So yes: price frequently rotates back through recently created gaps, and thin, fast-traded zones do often get revisited. But nothing is owed. "Price must rebalance" is a narrative stitched over ordinary pullback behaviour — and plenty of gaps simply never fill. Strong trends routinely leave a trail of untouched FVGs behind them for weeks, and a trader waiting at every gap for the "mandatory" fill funds the traders who didn't.

Keep the useful part — pullbacks often revisit fresh gaps — and drop the mystical part — gaps demand to be filled. That single edit will save you from most FVG misuse.

How to mark FVGs correctly

If you mark every three-candle gap on a five-minute chart, you'll paint the whole screen. Most of them mean nothing. Two filters separate the gaps worth watching from the noise:

• Only mark gaps left by impulsive displacement. Candle 2 should be an expansion candle: unusually large range for that chart, closing near its extreme, ideally the move that breaks a meaningful level. A tiny technical gap left by three drifting candles in a quiet session qualifies by definition — and matters not at all. The gap is only interesting because the move that created it was interesting.
• Only mark gaps that agree with trend context. A bullish FVG created by the impulse that just broke structure to the upside sits in a story: trend up, pullback likely, zone below price where the pullback might find buyers again. The same-shaped gap printed against the trend, or in the dead middle of a range, has no story around it — it's a shaded rectangle and nothing more.

A practical routine: read the market structure first — who is in control, where did the last break happen — and only then look for the FVG left by the leg that caused the break. Structure first, gap second. Never the other way around.

Consequent encroachment: the 50% line, in one paragraph

Consequent encroachment (CE) is ICT vocabulary for the 50% midpoint of the gap. The convention: rather than requiring a full fill, many traders watch the midpoint — treating a gap as "respected" if price trades into it but holds the CE level, and using that line for entries or invalidation (for example, entering a long as price tags the midpoint of a bullish FVG, with a stop below the gap's far edge). There's nothing magical about 50% — its real value is discipline: it forces you to define, in advance, exactly where your idea is working and exactly where it's wrong, instead of re-drawing the zone after the fact.

Using FVGs with structure — not instead of it

An FVG on its own is a rectangle. An FVG in context is a hypothesis you can test. Compare two setups:

The good version. Price is in a clear uptrend — higher highs, higher lows. An impulsive leg breaks the last swing high (a break of structure), and that leg leaves a fresh bullish FVG behind. Just below the gap sits the order block that launched the move. Now the pullback has a specific, pre-defined zone where several independent reads agree: trend direction, the origin of displacement, and the thin zone the impulse left. If buyers are going to defend anywhere, this is a logical place — and if price slices straight through the whole zone instead, you've learned something real: the buyers you were betting on didn't show up.

The bad version. Price has been chopping sideways for two days. Somewhere in the middle of the mess, three candles technically left a gap. There's no trend to resume, no structural break, no displacement worth the name — mid-range gaps like this get traded through in both directions all week, because in a range everything gets revisited. Marking that gap and trading it as if it were the first setup is how the FVG concept gets a bad reputation.

Same shape on the chart. Completely different information content. The difference is never the rectangle — it's everything around the rectangle.

A note on timeframes: the three-candle definition works identically on a weekly chart and a one-minute chart, but the gaps do not carry equal weight. A daily FVG left by an earnings-day displacement reflects far more committed participation than a one-minute gap left by a single burst of orders, and it tends to stay relevant for longer. Freshness matters too — a gap that has already been traded through once has, by any reading, been "rebalanced"; re-marking it and expecting a second reaction is wishful thinking. Newer gap, higher timeframe, cleaner trend: that's the hierarchy worth remembering.

Common FVG mistakes (and the quick fix for each)

• Marking everything. Twenty rectangles on one chart isn't analysis, it's decoration. Fix: one or two gaps per chart, only those created by displacement at a structural event.
• Trading gaps against the trend. A bullish FVG in a falling market is a zone sellers are happily using as fuel. Fix: read structure first; only mark gaps that agree with it.
• Re-drawing after the fact. If price blows through the whole zone and you quietly stretch the rectangle to "still count," you're not testing an idea — you're protecting one. Fix: define the invalidation (the far edge, or the 50% line) before price arrives, and let it be wrong.
• Treating a gap as an entry by itself. "Price entered the FVG" is not a trade; it's a location. Fix: demand a reaction you can actually see — a rejection, a lower-timeframe shift — before committing, and know your exit if it never comes.
• Quoting fill statistics as edge. Numbers nobody can reproduce are marketing, not evidence. Fix: collect your own sample in Replay and trust only what you counted yourself.

How to practice it (without risking anything)

1. Pull up a chart that's clearly trending. Find the last break of structure, then mark the FVG left by the impulse that caused it — nothing else.
2. Draw the 50% line and write down, before the pullback arrives, what "respected" and "invalidated" would look like. Then watch which one happens.
3. Repeat the exercise in a ranging session and count how differently gaps behave there. That contrast — not any fill statistic — is the actual lesson.

Prediction with instant feedback is how the pattern-recognition becomes automatic. Phase 10 of our free interactive course (ICT Concepts) covers fair value gaps alongside order blocks and liquidity, then puts you in candle-by-candle Replay drills where you mark the gap, commit to a read, and get graded on it — with zero money at stake.