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ICT Fair Value Gap (FVG) — Complete Guide

The ICT fair value gap (FVG) explained — the three-candle identification rule, bullish vs bearish FVG, the consequent encroachment (CE) entry level, four validity tests, the inverse FVG (IFVG), OB+FVG confluence, FVG vs volume imbalance, a five-step trading process, and five common mistakes.

A fair value gap is a price imbalance left behind when institutions move too fast for the market to fill both sides of a transaction. When a displacement candle moves so powerfully that the candle before it (C1) and the candle after it (C3) do not overlap, a gap forms — an area where price was delivered but not balanced. That gap is the FVG, and the algorithm is drawn back to fill it.

The FVG is one of the most frequently used PD arrays in the ICT methodology: it has a precise, objective identification rule, it appears on every timeframe in every market, and it consistently attracts price on retracements. When combined with an order block — the FVG sitting within the OB zone — it becomes the precision entry tool of the entire framework. This guide covers everything: the three-candle rule, the CE entry level, the four validity tests, the IFVG, the OB+FVG confluence, the volume imbalance distinction, a five-step trading process, and the five most common mistakes.

Key takeaways

Three-candle rule: C3 low > C1 high = bullish FVG. C3 high < C1 low = bearish FVG. No ambiguity — the rule is mechanical.
The CE (50% midpoint) is the primary entry level within any FVG — where reaction probability is highest.
Four validity tests: significant C2, unmitigated, HTF-aligned, correct premium/discount zone.
A fully mitigated FVG becomes an Inverse FVG (IFVG) — the same zone, opposite direction. Same concept as the breaker block.
The FVG within an OB zone — the OB+FVG overlap — is the highest-confluence precision entry in the ICT framework.

What is a fair value gap?

Definition

An ICT fair value gap (FVG) is a three-candle price imbalance where the high of candle 1 and the low of candle 3 do not overlap — leaving a gap that price is drawn back to fill. It indicates the market delivered price so aggressively in one direction that not all orders at those levels were transacted, creating an imbalance the algorithm seeks to correct. An FVG is not a traditional session gap (weekend/earnings) — it is an intracandle imbalance between three consecutive candles, forming at any time on any timeframe.

The three-candle rule — bullish and bearish

THE THREE-CANDLE RULE5M

One rule, two directions. Left: the bullish FVG — C2 displaces upward so forcefully that C3's low sits above C1's high. The gap between them is the FVG zone; the CE at 50% is the entry. Right: the bearish FVG — C2 displaces downward, C3's high sits below C1's low. Same rule, inverted. If C1 and C3 overlap, no FVG exists.

The CE — the 50% entry level

The consequent encroachment is the midpoint of the FVG zone — the price where reaction probability is highest. Bullish FVG CE = (C1 high + C3 low) ÷ 2. Bearish FVG CE = (C1 low + C3 high) ÷ 2. Enter at the CE, not the zone boundary — entering at the boundary exposes you to the full-fill scenario without the confirmation of a CE reaction. The CE is the level that balances maximum RR (deepest possible entry within the zone) against maximum probability (the 50% institutional equilibrium).

How deep does price fill?

CE-level fill (most common)

Price reaches 50%, reacts, and the delivery resumes

The scenario ICT traders plan for first. Enter at the CE, stop beyond the zone. If price respects the CE, the trade is running. The standard retracement in a healthy Phase 3.

Full fill

Price trades through the entire zone and closes beyond the far boundary

The FVG is mitigated. If already in from the CE, the stop beyond the zone exits at a defined loss. The mitigated zone may become an IFVG.

No fill (straight-line delivery)

Price continues without returning to the zone

More common during strong trending phases. An unfilled FVG remains valid as a future target — mark it and monitor. The strongest AMD quality signal.

The practical implication: always use a stop beyond the full FVG zone rather than at the CE. This protects against the full-fill scenario while still entering at the CE level.

Four validity tests — filtering institutional FVGs from noise

FOUR VALIDITY TESTSICT

Most FVGs on your chart will fail at least one test. The four filters reduce the universe of three-candle gaps to those with genuine institutional backing. A tiny 1-pip gap from drifting candles fails Test 1. A retested zone fails Test 2. A counter-trend FVG fails Test 3. A bullish FVG in premium fails Test 4. Only FVGs passing all four are standard-size entry candidates.

The Inverse FVG (IFVG) — when a mitigated FVG flips

When an FVG is fully mitigated — price closes beyond both boundaries — the zone does not disappear. It becomes an Inverse FVG: the same price zone, now acting in the opposite direction. A mitigated bullish FVG becomes a bearish IFVG (former support → resistance); a mitigated bearish FVG becomes a bullish IFVG (former resistance → support). The mechanics parallel the breaker block: stopped-out longs’ resting sell orders create the IFVG resistance when price returns from below. Trade the IFVG with the same process as a standard FVG, in the opposite direction, with HTF alignment and premium/discount confirmation.

OB + FVG confluence — the precision entry model

The most powerful PD array setup is not an OB alone or an FVG alone — it is the overlap of both at the same price. When an FVG forms within an order block zone (the FVG’s C3 low falling within the OB body range for a bullish setup), two institutional mechanics align at the same price: the OB’s resting accumulation orders and the FVG’s price imbalance. The FVG CE within the OB zone is the highest-confluence precision entry available — institutional orders + imbalance at the same price, the Priority #2 PD array configuration.

See the bullish OB guide and bearish OB guide for the complete OB+FVG overlap identification process and worked examples.

FVG vs volume imbalance

Two distinct concepts — the FVG carries higher institutional significance
Attribute	Fair value gap (FVG)	Volume imbalance
Candles	Three — C1, displacement C2, C3	Two — adjacent candles
Gap location	Between C1 high and C3 low (bullish)	Between C1 close and C2 open
Displacement	Required — C2 must be significant	Not required
Timing	Any point during the session	Often at session opens / market gaps
Institutional backing	Higher — three-candle displacement	Lower — opening gap mechanics
CE equivalent	CE = zone midpoint — primary entry	No defined CE
Fill behaviour	Partial (CE) or full	Generally fills completely

In the PD array hierarchy: BPR (highest) > FVG (medium) > volume imbalance (lower). When both exist at the same level, the FVG takes priority.

How to trade FVGs — five steps

Establish HTF bias and direction

Daily or 4H structure determines which FVGs to trade. Bullish structure: trade bullish FVGs as support. Bearish: trade bearish FVGs as resistance. Never enter an FVG opposing the HTF direction.

Identify a valid, unmitigated FVG and check for OB overlap

Apply the three-candle rule. Run the four validity tests. Mark zone top, bottom, and CE. Check if the FVG sits within an OB zone — if so, the OB+FVG overlap is the entry zone.

Wait for price to retrace into the FVG

Do not force entry — wait for the natural retracement through the expansion-retracement rhythm. As price approaches, switch to the LTF for confirmation.

Enter at the CE or on LTF CHoCH confirmation

CE reaction or a LTF CHoCH within the zone is the entry trigger. If the CHoCH forms near the zone top before the CE, the CE becomes the first target rather than the entry.

Stop beyond the full zone, target the next liquidity pool

Stop below C1 high (bullish) or above C1 low (bearish) — the full zone boundary, not the CE. Target: the next BSL or SSL in the HTF direction. Trail on LTF BOS.

Five common FVG mistakes

Trading a mitigated FVG

Once price closes beyond both boundaries, the imbalance is resolved. Mark mitigated FVGs immediately and remove from active consideration. Partial CE fills that don’t close beyond the zone = still valid.

Entering at the zone boundary instead of the CE

The boundary touch exposes you to the full-fill without CE confirmation. The CE is where probability is highest. Enter there — or on a LTF CHoCH near it — not at the first touch of the zone edge.

Trading FVGs against the HTF structure

A bullish FVG inside a daily downtrend is a counter-trend setup. The FVG may fill as price continues lower. HTF structure defines which direction institutions are pushing — trade only aligned FVGs.

Marking every minor three-candle gap as an FVG

Markets produce dozens of tiny gaps per session, especially on LTFs. A 1-pip gap from drifting candles is not institutional displacement. The C2 must stand out visually — at least 1.5–2× average candle size.

Setting the stop at the CE instead of the full zone boundary

Full-fill scenarios close beyond the CE and reach the far boundary. A stop at the CE gets triggered on a normal full rebalancing that would have reversed from the boundary. Always: stop beyond the full zone.

FAQ — ICT fair value gap

What is a fair value gap in ICT? +

A three-candle price imbalance where C1 high and C3 low don’t overlap (bullish) — the gap between them is a zone price is drawn back to fill. C2 is the displacement engine. Not a traditional session gap — an intracandle imbalance forming any time on any timeframe.

What is the CE of an FVG? +

Consequent encroachment — the 50% midpoint of the zone. Where reaction probability is highest. Bullish CE = (C1 high + C3 low) ÷ 2. The primary entry target for all FVG trades.

What is an inverse FVG (IFVG)? +

A fully mitigated FVG that flips direction. Mitigated bullish FVG → bearish IFVG (resistance). Mitigated bearish FVG → bullish IFVG (support). Same zone, opposite function — the FVG equivalent of a breaker block.

How is an FVG different from a volume imbalance? +

FVG: three candles, C1 high vs C3 low gap, requires a significant C2 displacement. Volume imbalance: two candles, close-to-open gap, no displacement required. FVGs carry higher institutional significance.

Conclusion — the FVG is the algorithm’s rebalancing signal

The fair value gap is the ICT methodology’s most precise and most consistently applicable PD array. The three-candle rule gives it objective identification. The CE gives it a defined entry. The validity tests ensure only institutional imbalances with genuine rebalancing pull are traded. And the IFVG shows that even when an FVG fails, the zone remains relevant — just in the opposite direction.

Three principles to carry: the CE is the entry, not the zone boundary; a mitigated FVG becomes an IFVG — the zone does not disappear, it flips; and an FVG nested within an OB zone is the highest-quality entry combination in the framework. These three rules, applied consistently, transform FVGs from interesting patterns into repeatable institutional entries.

The companion guides: the order block guide covers the OB that provides the FVG’s institutional context; the CE guide covers the midpoint principle across all zone types; the BPR guide covers the overlap of two opposing FVGs; the redelivery guide covers FVG rebalancing mechanics and the IFVG in depth; and the expansion & retracement guide covers the leg rhythm that creates and fills FVGs. Or join the mentorship for direct feedback on your FVG identification and CE entry execution.

Lio

Founder & ICT trading educator, LiquiditySweeps.com

Lio has traded ICT and Smart Money Concepts on forex majors and US indices since 2021 and built LiquiditySweeps.com to teach the framework the way it should be learned: in sequence, on real charts, with free live tools instead of paid indicators. Every article on this site follows the same rule — nothing gets published that wouldn’t survive a trade review.

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Quick check

Price retraces into a bullish FVG and reaches the CE. Where should your stop be?

✓ Correct. The stop goes below the FULL FVG zone bottom (C1 high for a bullish FVG), not at the CE. A full-fill scenario retraces past the CE to the far boundary — a stop at the CE gets triggered on a normal rebalancing that would have reversed from the zone edge.