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.
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.
What Is a Fair Value Gap?
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.
- Candle 1: A bearish or neutral candle
- Candle 2: A strong bullish candle (the "impulse" candle)
- Candle 3: A bullish candle
- The FVG zone = the gap between the high of Candle 1 and the low of Candle 3
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 FVG zone = the gap between the low of Candle 1 and the high of Candle 3
Why Do FVGs Fill?
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.
Bullish FVG: The Retracement Entry
A bullish FVG acts as a support zone when price retraces into it after the initial impulse move.
The Setup:
- Strong bullish impulse creates an FVG
- The impulse breaks structure (BOS) — confirming the move was significant
- Price retraces back into the FVG zone
- A bullish confirmation signal forms (hammer, engulfing, morning star)
- Enter long with stop below the FVG; target the next structural high
The FVG gives you a precise entry zone — you are not guessing where to buy. You are entering at the exact level where the market was inefficient and where buyers are likely to re-engage.
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?"
Bearish FVG: The Resistance Zone
A bearish FVG acts as a resistance zone when price rallies back into it after the initial bearish impulse.
The setup mirrors the bullish version — wait for the rally into the FVG zone, look for bearish confirmation (shooting star, engulfing, evening star), and enter short with stop above the 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?"
FVG Characteristics That Affect Reliability
Not all FVGs are equal. Several factors influence how reliable an FVG is as an entry zone:
Size: Larger FVGs (wider zones) tend to attract more attention and provide more room for price to maneuver. Very small FVGs on low-volume periods are less reliable.
Timeframe: FVGs on higher timeframes (daily, weekly) carry more weight than those on 5-minute charts. A daily FVG is a significant institutional imbalance.
Context: An FVG formed during a Kill Zone (London Open, NY Open) is more significant than one formed during the Asian low-volume session.
Structural alignment: The most powerful FVGs form at the same time as a Break of Structure — the impulse that creates the BOS simultaneously creates a major FVG.
Distance from price: FVGs near current price are more immediately tradeable. Gaps far from price may be relevant in the future but require patient waiting.
FVGs and Order Blocks: The Confluence Zone
The most powerful SMC entry zones occur when a Fair Value Gap overlaps with an Order Block. This creates a "confluence zone" — two independent institutional reasons why price is likely to react at the same level.
- The OB represents where institutional orders were placed
- The FVG represents a price inefficiency that needs to be balanced
When price returns to a zone containing both an OB and an FVG, the probability of a sharp reaction 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."
Partial vs. Full FVG Fill
Price does not always fill an FVG completely. Traders distinguish between:
Partial Fill: Price enters the FVG but does not close beyond it. This is often the best entry zone — price dips into the imbalance to collect orders, then reverses. Entry is taken as price enters the FVG and shows reversal signals.
Full Fill: Price closes completely through the FVG. This can either mean the FVG has been "respected" (the entry was valid, price just needed to fill fully before reversing) or "violated" (the original bullish thesis 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 and the zone may now act with less gravity.
FVGs in Different Markets
Forex: FVGs are extremely common in forex due to the 24/5 trading with daily gaps at the Asian open and the London open. 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 FVG 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?"
Practical Summary: The FVG Trading Framework
| Step | Action |
|---|---|
| 1. Identify the FVG | Find the three-candle formation; define the gap zone |
| 2. Confirm the context | Is the FVG in alignment with the higher timeframe trend? |
| 3. Wait for price to return | Do not chase — let price come to the FVG |
| 4. Look for confirmation | Bullish/bearish candlestick patterns as price enters |
| 5. Time it to a Kill Zone | London Open or NY Open entries carry more weight |
| 6. Manage the trade | Stop beyond the FVG; target the next structural level |
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."