A fair value gap (FVG) is a three-candle pattern where the wick of the first candle and the wick of the third candle don't overlap — leaving a visible gap in between. It happens when price moves so quickly in one direction that it skips over a price range without much two-sided trading there, leaving an "imbalance" between buyers and sellers at that level.
A bullish FVG forms during a sharp rally — the gap sits below current price. A bearish FVG forms during a sharp decline — the gap sits above current price. Either way, the gap marks a range where trading was thin.
Because that price range saw little genuine two-sided trading when it was skipped over, it's treated as an area price is statistically more likely to revisit — to let buyers and sellers who missed the original move transact at that level. "Filled" doesn't mean guaranteed; it means price traded back through part or all of that range, which happens often but not always.
Scan Mode's structure detection identifies genuine FVGs (real three-candle imbalances, not just any small gap) and factors whether price is interacting with one into the overall confidence score, alongside order blocks, liquidity sweeps and multi-timeframe confirmation. Like every structural factor, it's one input among several — not a standalone signal.
Educational content only. Not financial advice. Chart structure concepts do not guarantee any trading outcome.