| Attribute | Fair value gap (FVG) | Volume imbalance (VI) |
|---|---|---|
| Pattern type | 3-candle (C1 → C2 displacement → C3) | 2-candle (C1 → C2) |
| Gap defined by | WICK boundaries (C1 high + C3 low) | BODY ranges (C1 close + C2 open) |
| Wick overlap | Never — the defining FVG feature | Common — wicks may overlap |
| Requires displacement | Yes — C2 is the displacement candle | No — any two adjacent body gap |
| Institutional backing | Moderate — C2 displacement order flow | Partial — directional commitment only |
| Fill speed | Moderate — institutional backing resists | Faster than FVG — less resistance |
| Primary use | Entry zone (CE precision entry) | Context-dependent (fill target or entry ref) |
VI zone: C1 close (lower) to C2 open (upper). Wicks may overlap. Filled when price retraces bearishly into the zone from above. Role: fill target within displacement or entry reference at a PD array boundary.
VI zone: C2 open (lower) to C1 close (upper). Filled when price rallies bullishly into the zone from below. Same context-dependent role.
C1’s close and C2’s open must not share a price. Minimum gap: 5 pips on EUR/USD. The wicks may overlap — only the body ranges matter.
From C1’s close (one boundary) to C2’s open (other boundary). Do NOT extend the rectangle to the wick extremes — the VI zone is the body gap, not the full candle range.
Light amber or yellow tint with a dashed border, labelled “VI.” This distinguishes VIs from FVGs (teal/coral solid) and prevents misclassification during live sessions.
Discard micro-gaps below 5 pips on EUR/USD (or equivalent on other instruments). Many FVG community indicators include VI as a toggleable sub-type — enable it and apply the minimum.
The single most common classification error. Check: 2 candles or 3? Body boundaries or wick boundaries? If wicks overlap but bodies do not → VI. If wicks do not overlap across a 3-candle pattern → FVG.
VIs have partial backing — less institutional support than FVGs. A standalone VI entry without OB, FVG, or structural confluence has lower probability. Use VIs as precision references within a broader PD array context, not as standalone entries.
The VI is the body-to-body gap. Drawing to the wicks creates an incorrectly wider zone that overlaps with the wick area — which is NOT part of the VI. Mark body boundaries only.
Apply the minimum size filter (5 pips EUR/USD). Micro-gaps are routine candle-to-candle variance, not meaningful imbalances. The gap should also be proportionally significant relative to surrounding candle body sizes.
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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