A fair value gap, or FVG, is another popular Smart Money Concepts idea. It points to a spot where price moved so fast that it left a little "gap" behind — a zone traders watch for price to come back to. This article keeps it simple: what an FVG is, how to spot the three-candle pattern, and what it really tells you.
(Quick note: nothing here is financial advice. An FVG is a way to read a chart, not a promise about what price will do.)
What is a fair value gap?
An FVG is a three-candle pattern. In the middle is one big, fast candle. The gap is the space left when the first and third candles don't overlap:
- Bullish FVG — during a sharp move up. It's the space between the high of the first candle and the low of the third. Watched as a support zone below price.
- Bearish FVG — during a sharp move down. The space between the low of the first candle and the high of the third. Watched as a resistance zone above price.
One honest point up front: it's not a real gap like a weekend gap on a stock chart. Price did trade through there — the middle candle covers the whole range. The "gap" just means one side barely got to trade, because price ripped through so quickly.
Why price may "fill" the gap
The theory: a fast one-sided move leaves orders unfilled on the other side, at "unfair" prices. So price often comes back to let that side trade — to "rebalance" — before carrying on.
It's a useful idea, but be honest about the limits: gaps don't always fill. Plenty never get revisited, especially in a strong trend or after big news. Some fill only partway. Any "FVGs fill X% of the time" number you see online is self-reported and varies a lot. Treat the fill as a tendency, not a rule.
How to spot one
The three-candle check:
1 — Find a big middle candle. A strong, fast move in one direction.
2 — Look at the candles either side. For a bullish FVG, is the third candle's low above the first candle's high? For a bearish FVG, is the third candle's high below the first candle's low?
3 — If there's a gap, mark it. Draw the zone between those two levels and extend it forward. If the outer candles overlap, there's no FVG.
How traders use them
As targets. An unfilled gap above or below can act as a magnet — a spot price may head toward.
As entry zones. When price returns into the gap, traders look for a reaction to enter, often around the halfway point, with a stop past the far edge.
With other clues. An FVG that lines up with a key level is treated as stronger.
FVGs and order flow
This is where an FVG gets more solid. That fast candle is, in plain terms, an order-flow imbalance — aggressive orders on one side overwhelmed the resting orders on the other, so price skipped levels.
On a footprint chart, that same move shows up directly: stacked imbalances and a strong one-sided delta through the candle. In other words, a price-only FVG guesses there was an imbalance from the shape of the candles; order flow measures it. Same event, just seen in more detail — and the extra detail helps you tell a real, high-conviction move from a thin one.
Common mistakes
- Assuming every gap fills. The most common trap. Build around "tends to," not "must."
- Trading tiny gaps. Small gaps on low timeframes are often just noise. Higher-timeframe FVGs carry more weight.
What you need
You can spot FVGs on a plain candle chart, but to see the imbalance behind them you want order flow. ATAS shows the footprint and delta that reveal it, with a free trial to practice on.
The bottom line
A fair value gap marks a spot where price moved so fast it left one side barely traded — a three-candle imbalance that price often, but not always, comes back to fill. It's a handy way to spot zones and targets, as long as you remember it's a tendency, not a promise. And under the hood, it's just an order-flow imbalance — something a footprint chart shows you directly.
New to the live read? Start with How to Read Order Flow.