A fair value gap (FVG) is not a chart pattern in the classic sense, it is a byproduct of order flow: an area where buyers or sellers moved price so fast that no meaningful two-way trading occurred, leaving an inefficiency that the market frequently returns to fill.
1. The three-candle definition
To identify a bullish FVG, look at three consecutive H4 candles. If the high of candle 1 is lower than the low of candle 3, the space between those two points, which candle 2 skipped over on its way up, is the fair value gap. For a bearish FVG, the logic inverts: the low of candle 1 sits above the high of candle 3.
Example: candle 1 has a high of $2,618. Candle 2 rallies hard to a high of $2,641 with a low of $2,622. Candle 3 opens and holds above $2,624, never trading back below it. The zone from $2,618 to $2,624 is the unfilled gap; no orders were transacted there because price moved through it in one impulsive move.
2. Why gaps get filled
Institutional order flow, particularly algorithmic execution that works large orders over time, tends to seek the best available price. An unfilled gap represents a zone with a thin order book, and it is common for price to retrace into that zone later to "rebalance" before continuing in the original direction. This is not guaranteed, roughly 30% of gaps on H4 gold charts are never revisited before price moves on, so an FVG is a zone of interest, not a standalone signal.
3. Trading the retest
- Mark the FVG boundaries immediately after the three-candle pattern completes.
- Wait for price to retrace into the gap, ideally to the 50% midpoint rather than the very edge, since a shallow tag with immediate rejection carries a higher failure rate.
- Look for a lower-timeframe (M15 or M5) bullish engulfing or rejection wick inside the zone before entering, rather than buying the first touch blindly.
- Place the stop just beyond the far edge of the gap (below candle 1's low for a bullish setup), since a full fill and continuation through it usually invalidates the setup.
4. Filtering out low-quality gaps
Not every FVG deserves a trade. Gaps under $3 on gold's H4 chart are frequently just noise from a single news candle and get filled almost immediately without producing a tradable bounce. Prioritize gaps that: (1) formed during the London or New York session rather than the Asian session, when volume is thin, (2) align with a prior structural swing point, and (3) sit near a round number like $2,650 or $2,700, where resting orders cluster.
A useful confluence check is combining the FVG with the 50-period EMA on H4. If the gap's midpoint sits within 0.3% of the EMA value, the setup gains an additional layer of institutional relevance since moving averages often mark where algorithmic rebalancing occurs.
