Fair Value Gaps: Trading Market Imbalances
Understand Fair Value Gaps (FVG) in Smart Money Concepts — what causes price imbalances, how to identify bullish and bearish FVGs, and how to use them as high-probability entry zones.
Understand Fair Value Gaps (FVG) in Smart Money Concepts — what causes price imbalances, how to identify bullish and bearish FVGs, and how to use them as high-probability entry zones.
A Fair Value Gap is one of the most intuitive concepts in Smart Money Concepts — once you see it, you cannot stop seeing it on every chart. It represents a zone where the market moved so aggressively that buyers and sellers never had a chance to trade at equilibrium. The market "owes" a revisit to fill that imbalance.
Understanding FVGs gives you a precise, mathematically defined entry zone that is grounded in actual market mechanics — not arbitrary indicator readings.
An FVG (also called an imbalance, liquidity void, or inefficiency) forms within a three-candle sequence when the market moves so rapidly that a gap exists between the range of Candle 1 and the range of Candle 3:
Bullish FVG: Formed during a bullish impulse.
If the high of Candle 1 is at $100 and the low of Candle 3 is at $103, there is a $3 gap where no trading occurred. This is the FVG zone.
Bearish FVG: Formed during a bearish impulse.
The market revisits FVGs for a fundamental reason: unmatched orders.
When price moves so aggressively that it skips a price zone, there are still buyers and sellers who wanted to trade at those prices. Those unfilled orders create a gravitational pull. Additionally, market makers have an incentive to revisit these zones to facilitate balanced two-sided trading.
Not all FVGs fill immediately — some fill within hours, some take weeks, and a minority never fill before an even larger structural move occurs. But statistically, FVGs are among the most reliable "price magnet" zones in market analysis.
A bullish FVG acts as a support zone when price retraces into it after the initial impulse move.
Multi-Factor FVG Analysis:
The FVG gives analysts a mathematically defined zone where the market was inefficient and where order balance is tested.
Ask Diplyzer:
"Find all active bullish fair value gaps on [ticker] on the daily chart. Which are closest to the current price? Has price begun retracing toward any of them?"
A bearish FVG acts as a resistance zone when price rallies back into it after the initial bearish impulse.
The evaluation mirrors the bullish version — monitor the rally into the FVG zone, inspect for bearish candle rejection (shooting star, engulfing, evening star), with structural invalidation above the high of the bearish FVG.
Ask Diplyzer:
"Show me all bearish fair value gaps on EURUSD on the 4-hour chart. Are any of them acting as current resistance?"
Not all FVGs carry the same structural significance:
Size: Larger FVGs (wider price ranges) represent greater liquidity imbalances. Very small FVGs on low-volume periods carry less statistical weight.
Timeframe: FVGs on higher timeframes (daily, weekly) carry more significance than those on 5-minute charts. A daily FVG represents a substantial institutional imbalance.
Context: An FVG formed during a Kill Zone (London Open, NY Open) reflects high institutional session volume.
Structural alignment: The most significant FVGs form at the same time as a Break of Structure — the impulse that creates the BOS simultaneously creates a major FVG.
The most powerful SMC zones occur when a Fair Value Gap overlaps with an Order Block. This creates a "confluence zone" — two independent institutional price action reasons why price is likely to react at the same level.
When price returns to a zone containing both an OB and an FVG, structural confluence is significantly elevated.
Ask Diplyzer:
"On [ticker]'s daily chart, are there any zones where a fair value gap and an unmitigated order block overlap? Show me the full confluence picture."
Price does not always fill an FVG completely. Analysts distinguish between:
Partial Fill: Price enters the FVG but does not close beyond it. Price dips into the imbalance to balance liquidity, then shows rejection in the primary trend direction.
Full Fill: Price closes completely through the FVG. This can indicate that the imbalance has been mitigated or that the original structural trend is weakening.
A full fill of a bullish FVG followed by a strong bullish close within the FVG is considered "FVG mitigation" — the imbalance has been addressed.
Forex: FVGs are common in forex due to the 24/5 trading session transitions. The opening of each major session often creates FVGs.
"Find all fair value gaps created during the last 5 London Open sessions on GBPUSD on the 1-hour chart."
Stocks: Overnight gaps in stocks create natural FVGs — the gap between Friday's close and Monday's open (or any session's close and the next open) is a classic imbalance that the market often returns to fill.
"Are there any unfilled gap FVGs on [stock] from the last 3 months? When did they form and how far is price from filling them?"
Crypto: FVGs form constantly in crypto due to its 24/7 nature and frequent volatility spikes. On higher timeframes, they represent significant imbalances.
"Show me all bullish fair value gaps on Bitcoin's 4-hour chart from the last month. Which are still unfilled?"
| Step | Focus |
|---|---|
| 1. Identify the FVG | Locate the three-candle formation; define the gap zone |
| 2. Confirm the context | Is the FVG aligned with the higher timeframe trend? |
| 3. Monitor retracement | Observe price action as it re-enters the FVG |
| 4. Look for confirmation | Reversal candlestick patterns as price tests the zone |
| 5. Session Timing | Check whether testing coincides with London or NY Open windows |
| 6. Risk Boundaries | Structural invalidation lies beyond the opposing boundary of the FVG |
Full FVG analysis with Diplyzer:
"Complete fair value gap analysis for [ticker] on the 4-hour and daily charts: all active FVGs, their fill status, which are near current price, and any that overlap with unmitigated order blocks."