Fair Value Gaps

Introduction

Markets like efficiency. When price moves in an orderly way, every level gets traded through fairly, buyers and sellers meeting at each step. But when one side suddenly overwhelms the other — a burst of aggressive buying or selling — price can rocket through a range so fast that it leaves a gap it never traded fairly through. In market-structure trading this is a fair value gap (FVG), also called an imbalance, and the key observation is that the market often returns to fill it — to rebalance the inefficiency — before continuing. FVGs have become one of the most-used concepts in modern technical analysis, both as targets price is drawn toward and as zones where price reacts. This lesson explains how an FVG forms, what it represents, how it behaves, and how it differs from a classical gap.

This builds on the break-of-structure and swing-point lessons, and pairs naturally with order blocks — the two are often used together.

Quick Definition

A fair value gap (FVG), or imbalance, is a three-candle formation where a fast, one-sided move leaves a gap: the wick of the first candle and the wick of the third candle fail to overlap, leaving a range (spanning the big middle candle) that price "skipped." It marks an inefficiency, and the market tends to return to fill it. A bullish FVG (from a strong up-move) acts as support on the return; a bearish FVG (from a strong down-move) acts as resistance.

The essence is inefficiency. A fair, orderly market trades through every price; an FVG is a slice of prices that one side blew through too fast — and the market often comes back to do business there.

How a Fair Value Gap Forms

An FVG is read across three consecutive candles during a strong move. Take a bullish example (a sharp rally):

1. Candle 1 — a normal candle; note its high (including the wick).
2. Candle 2 — a large, strong up candle that displaces price rapidly.
3. Candle 3 — note its low (including the wick).

If candle 3's low is above candle 1's high, there is a gap between them — a band of price that the explosive candle 2 jumped over without candle 1 and candle 3 overlapping. That gap is the fair value gap. For a bearish FVG, it's the mirror: a sharp down-move where candle 3's high is below candle 1's low. The faster and more one-sided the middle candle, the larger the imbalance it leaves.

Why Price Returns to Fill It

The central idea is that the market seeks to rebalance inefficiency. A fair value gap is a zone where price moved so fast that orders went unfilled — buyers who wanted in at those prices, or sellers who wanted out, didn't get the chance. So the market is often drawn back to the gap to let that business happen — to "fill" or "rebalance" the imbalance — before resuming its move. On the return, the FVG frequently acts as a reaction zone: a bullish FVG offers support (buyers step in within the gap and price bounces), a bearish FVG offers resistance. This gives traders two uses at once: the unfilled gap is a target (price may travel to fill it), and the filled gap is a support/resistance zone (price may react there). Often a partial fill — price tagging the edge or midpoint of the gap — is enough.

Fair Value Gaps versus Classical Gaps

It is important not to confuse an FVG with a classical price gap. A classical gap is a literal break between one session's close and the next session's open — an overnight or weekend jump that leaves an empty space on the chart (covered in the gaps discussion in the candlestick/price-action material). A fair value gap is different: it is an imbalance within a continuous series of candles, defined by the non-overlapping wicks across three bars. No session gap is needed — an FVG can appear in the middle of a fast intraday move where price never actually stopped trading. Both share the tendency to fill, but the FVG is an intra-series inefficiency, not a session-to-session gap. Keeping the two straight avoids a common confusion.

Using FVGs in Practice

FVGs are most powerful in confluence, not alone:

• As a target. An unfilled FVG below price (bullish) or above it (bearish) is a magnet — a reasonable objective for where price may travel to rebalance.
• As a reaction zone. On the return, watch the FVG for support or resistance, ideally confirmed by a reaction or a lower-timeframe change of character before entering.
• With order blocks. An FVG that sits with an order block (an OB that leaves an FVG behind it) is a stronger zone than either alone — a frequent high-confluence setup.
• In the right location. An FVG in discount within an uptrend (the next lesson) is a better long zone than one in premium.

Reading It Honestly

The tendency to rebalance imbalances is real — fast moves genuinely do leave thin, unfilled areas that price often revisits. But it is a tendency, not a law. Many FVGs fill only partially, fill much later, or — in a powerful trend — don't fill for a long time at all. Treating "the gap must fill" as a certainty is how traders get hurt, holding for a fill that doesn't come or fading a trend that keeps running. An FVG is a zone of interest to combine with structure, liquidity and confirmation — not a guaranteed event. Used that way, it's a sharp tool for spotting where price is likely to react or travel.

Common Misconceptions

• "An FVG is the same as an overnight gap." No — a classical gap is between sessions (close to open); an FVG is an imbalance within continuous candles, defined by non-overlapping wicks across three bars.
• "Every fair value gap fills completely." It's a tendency, not a guarantee. Fills are often partial, delayed, or — in strong trends — long deferred.
• "You can trade FVGs in isolation." They work best in confluence — with order blocks, structure and the right premium/discount location — and with confirmation on the return.
• "A bigger gap is always better." A large imbalance is significant, but size alone doesn't guarantee a reaction; location and context matter more than raw size.

Real-World Application

A trader sees a strong rally break structure to the upside, and on the way up notices a clean fair value gap — a three-candle burst where the first candle's high sits well below the third candle's low, leaving an obvious imbalance. Rather than chase the rally, they mark the FVG as a demand zone and wait. Price pushes higher, stalls, then pulls back — and returns to fill the gap. As it trades into the imbalance, the trader watches the lower timeframe: price reacts, prints a small change of character back up, and holds the gap as support. That's the entry — long within the FVG, stop just below it, targeting the recent highs (and the liquidity above them). Price resumes its climb. A second trader who had shorted the pullback, assuming the rally was over, was stopped out when the FVG held and price turned back up. The imbalance marked exactly where buyers were waiting — which is what a fair value gap is for.

Key Takeaways

• A fair value gap (FVG) is a three-candle imbalance — the first candle's wick and the third candle's wick fail to overlap, leaving a gap a fast move skipped.
• It marks an inefficiency, and the market tends to return to fill it; a bullish FVG acts as support, a bearish FVG as resistance, on the return.
• It differs from a classical price gap (a session close-to-open jump) — an FVG is an imbalance within continuous candles, no session gap required.
• Use FVGs as targets (price may fill them) and reaction zones, best in confluence with order blocks, structure and premium/discount location.
• The fill tendency is real but not guaranteed — many fill partially or late, so treat an FVG as a zone of interest with confirmation, not a certainty.