What Is a Fair Value Gap?

A Fair Value Gap, usually just called an FVG, is a specific pattern that shows up on a price chart when the market moves fast enough to leave a visible gap between candles. If you're still getting comfortable with the basics of how a trade actually works, our What Is Forex Trading guide covers that ground first.

The name comes from the idea that the middle candle prints a price range that barely traded, on the theory that price may eventually revisit that zone before continuing in its original direction. It's a way of describing something that already happened on a chart, not a signal that predicts what happens next. This guide covers what the pattern actually is, how traders commonly identify one, and what it does and doesn't tell you, without claiming it's a reliable way to predict where price is headed.

The Three-Candle Pattern, Explained

An FVG is built from three consecutive candles, and it's the relationship between all three that identifies it, not any single candle on its own.

• Candle 1 forms a normal high and low, like any other candle.
• Candle 2 moves quickly and strongly in one direction, sometimes called an impulsive or displacement candle.
• Candle 3 forms its own high and low, but doesn't fully overlap back into candle 1's range on the side the move happened.

In a bullish FVG, the low of candle 3 sits above the high of candle 1, leaving an untouched zone below current price. In a bearish FVG, the high of candle 3 sits below the low of candle 1, leaving an untouched zone above current price. Either way, price passed through that space once, quickly, without any wick trading back into it.

On a standard candlestick chart, including the ones built into MetaTrader 4 and MetaTrader 5, each candle only represents the prices that actually traded during that period. When a move is fast enough to skip over a range within a single candle, the next candle can open and close without ever printing a wick back into that space, which is what leaves the visible gap on the chart.

Why This Gets Linked to Institutional Order Flow

FVGs are often discussed alongside a broader set of ideas sometimes grouped under "smart money concepts," a loose label for reading a chart in terms of where larger market participants may have been active, rather than relying only on traditional indicators.

The reasoning behind linking a fast, one-directional candle to institutional activity has to do with how the forex market is actually structured. Unlike a stock exchange, spot forex trades over the counter, through a decentralized network of dealers rather than a single centralized order book, and more than 80% of customer order flow is matched internally by those dealers rather than displayed on a public venue, according to the Bank for International Settlements' most recent Triennial Survey analysis^[1]. In a market structured that way, a large order can move price through a level quickly, before smaller orders have had a chance to trade at every price in between, which is one plausible mechanical explanation traders give for why a gap like this can appear in the first place.

That's a description of a possible mechanism, not a confirmed cause. There's no way to see, after the fact, whether a specific FVG was actually caused by a large institutional order rather than a fast reaction to news or simply thin liquidity at that moment. Traders who use the concept generally treat it as a label for a type of price behavior, not as proof of who caused it.

How Traders Spot a Fair Value Gap on a Chart

Spotting an FVG manually means scanning three-candle sequences for a fast move where the surrounding wicks don't overlap, which is slow to do by eye across an entire chart, especially on lower timeframes where dozens of candles print every hour. Displacement candles that create gaps also tend to cluster around the busiest parts of the trading day, such as the London and New York session overlap, when liquidity and participation are both higher.

ForexDealsPro's free FVG Scanner automates that scanning process on MT4 and MT5, marking bullish and bearish gaps directly on the chart as they form and fading them once price has traded back into the zone, so identifying the pattern doesn't depend on checking every candle by hand.

How Traders Commonly Use an FVG as a Reference Point

Once an FVG is marked, it's typically treated as a zone worth watching rather than an instruction to enter a trade. Some traders watch for price to return to a fresh, unfilled gap before deciding whether the broader trend and other context still support the original direction. Others use a filled gap as one input, among several, when reviewing why a move happened after the fact.

Because the concept describes a chart pattern rather than a rule with a fixed outcome, it doesn't tell a trader whether a gap will get filled, when that might happen if it does, or what happens afterward. Two FVGs that look identical on a chart can behave completely differently, and treating the pattern as a standalone entry or exit rule, without a wider trading plan and independent risk management, carries the same risks as any other approach to reading price action.

That's also why position sizing and a defined stop loss matter just as much here as with any other setup. Our forex risk management guide covers how to size a position so that being wrong about a single FVG, or anything else, doesn't put a meaningful share of an account at risk.

What an FVG Does Not Tell You

An FVG doesn't indicate direction with certainty, doesn't estimate how far price might move, and doesn't by itself account for news events, session timing, or the broader trend. It also says nothing about position size or how much of an account should be risked on any single idea.

Leveraged products such as forex CFDs already carry meaningful risk on their own, before any particular chart pattern is factored in. In the UK, for example, retail leverage on major currency pairs is capped at 30:1 under FCA rules, specifically because trading on margin can produce losses that move quickly relative to the funds actually deposited^[2]. Whatever pattern or concept a trader is using to plan an entry, that underlying risk sits underneath every trade regardless.

Does This Kind of Chart Reading Fit Your Trading Style?

Reading three-candle patterns across a live chart, waiting for a specific gap to form, and deciding when it's still relevant all take a particular kind of attention and patience. That approach suits some trading styles more than others. If you're still working out whether a faster, chart-reading approach or a slower, less hands-on style fits you better, our free What Type of Trader Are You? quiz is built to help with exactly that kind of self-assessment.

The Bottom Line

A Fair Value Gap describes something that already happened on a chart: a fast move that skipped over a range of prices, leaving a visible zone behind it. Whether that zone matters again later, and what a trader might do about it if it does, depends on far more than the gap itself, including trend, timing, and a trader's own plan for managing risk.

The most direct way to see how it works is on your own chart. ForexDealsPro's free FVG Scanner marks these gaps automatically on MT4 and MT5, so you can watch how they actually form and behave before trying to spot them by eye. And because none of this depends on real money to learn, it's worth practicing on a demo account first; our Demo Account vs Live Account guide covers how long that's usually worth doing.

Frequently Asked Questions

References

References

1. Bank for International Settlements: "The FX trade execution landscape through the prism of the 2025 BIS Triennial Survey," BIS Quarterly Review, December 2025: bis.org/publ/qtrpdf/r_qt2512v.htm
2. Financial Conduct Authority: PS19/18 — Restricting contract for difference products sold to retail clients, 2019: fca.org.uk/publications/policy-statements/ps19-18-restricting-contract-difference-products