A fair value gap (FVG) is an imbalance. Price moved so fast in one direction that the three-candle sequence left a hole: the wick of candle one and the wick of candle three do not overlap. That space is the gap. The market often comes back later to rebalance it.
How to mark one
Look at three consecutive candles. If candle two is a strong displacement and candles one and three do not overlap, the empty region between them is the FVG. Bullish gaps sit in an up-move (price jumped up and left space). Bearish gaps sit in a down-move. You do not need a special indicator. You need to look.
Not every tiny gap on a 1-minute chart is worth your attention. The ones that matter are attached to displacement, a fast, one-sided move that also broke something: a level, a short-term high, a range. An FVG in the middle of chop is just noise.
Why price comes back
Markets like to transact at prices that were skipped. That is the simple version. You will see price rally, leave a gap, then return to the gap, react, and continue, or fill the whole gap and keep going the other way. The gap is an area of interest, not a promise.
Treat an FVG like support and resistance: a location to watch, combined with structure. A gap in the direction of structure is more useful than a gap you found because you wanted a reason to click.
Practice
On a 15-minute chart, find the last impulsive move. Mark the three-candle gap. Then see whether price returned to it on the following hours. Do this for a week. You will start seeing gaps as they print, which is the only skill this page is trying to build.
Which gaps to ignore
On a 1-minute chart you will see gaps constantly. Most are noise. Keep the ones attached to a displacement that also broke a short-term high or low. A gap in the middle of a 20-point range on US30 is not a thesis. A gap after a sweep and a close through yesterday’s high is a location to watch on the way back.
Partial fill vs full fill: price often tags the edge of the gap and continues. Sometimes it fills the whole thing and keeps going the other way. The gap never promised you an entry. It promised you an area. Combine it with structure or skip it.
How to find a gap worth marking
- Look for a candle that moved with real speed, leaving a body far larger than the ones around it.
- Check whether the wick of the candle before and the wick of the candle after fail to overlap. That unfilled space is the gap.
- Ask whether the move that created it also broke a short term high or low. If it did not, the gap is probably noise.
- Mark the zone with two edges: the full gap, and the halfway point inside it.
- Watch what happens on the first return. Reaction at the edge, full fill, or straight through.
Which gaps to keep and which to ignore
| Gap | Keep it? | Why |
|---|---|---|
| Formed on displacement that broke structure | Yes | Speed plus a structural event means real participation |
| Formed at a session open | Usually | Fresh volume created it, so it is a genuine reference |
| Inside a tight range | No | Everything is a gap in a quiet market |
| On a 1 minute chart during low volume | No | You will find dozens and none of them mean anything |
Partial fill, full fill, and straight through
A gap is an area, not a promise. Three things commonly happen when price returns. It tags the near edge and continues, which is the partial fill. It travels all the way through and keeps going, which means the imbalance was not defended. Or it fills completely and reverses from the far edge, which is the version people post screenshots of.
Because all three happen regularly, a gap on its own is never a reason to act. It becomes useful when it sits at a location that structure already made interesting. That is the difference between using a tool and collecting one.
Frequently asked questions
Is a fair value gap the same as an imbalance?
In practice the words are used for the same thing: unfilled space left by a fast one sided move. Different communities prefer different labels.
Do all gaps get filled?
No. That belief costs people a lot of money. Many are filled, plenty are not, and some take weeks.
Which timeframe gap is most reliable?
For day trading, gaps on the 15 minute and 1 hour survive scrutiny far better than 1 minute gaps.
Key takeaways
- A gap is unfilled space left by speed, and it marks an area rather than an entry.
- Keep gaps attached to displacement that also broke a high or low.
- Partial fill, full fill, and straight through all happen. Plan for all three.
- Combine the gap with structure or ignore it.
Technical analysis terms used in this category
| Term | Plain definition |
|---|---|
| Swing high | A candle with a higher high than the candle either side of it, obvious enough that a stranger would mark the same one. |
| Swing low | The same idea inverted. A candle with a lower low than both neighbours. |
| Structure | The sequence those highs and lows form. Higher and higher is an uptrend, lower and lower is a downtrend, mixed is a range. |
| Liquidity | Resting orders, mostly stops and breakout entries, clustered at obvious prices. |
| Sweep | Price wicks beyond an obvious level, takes the orders there, and closes back inside. |
| Break of structure | A body closing beyond an obvious swing point and holding. Control has changed on that timeframe. |
| Displacement | A fast, one sided move that leaves an obvious mark on the chart. |
| Fair value gap | Unfilled space left behind by displacement, where the wicks either side do not overlap. |
| Acceptance | Repeated closes beyond a level, which is the opposite message from a sweep. |
| Confluence | Independent pieces of evidence pointing the same way. Not a smaller chart arguing with a bigger one. |
The order these concepts belong in
Technical analysis becomes confusing when the concepts are learned as a list instead of a chain. Each one depends on the one before it, and skipping a link is why traders can define every term and still not read a session.
- Highs and lows. Nothing else works until you can mark these the same way twice.
- Structure. Highs and lows in sequence give you trend or range.
- Levels. Support, resistance, prior day extremes, overnight boundaries.
- Liquidity. Why those particular levels attract price at all.
- Sweeps and breaks. The two things that can happen when price arrives.
- Gaps and displacement. The trace left by speed, used as a reference not a trigger.
- Timeframes and sessions. The clock that decides how much any of it means.
Read them in that order and each lesson explains the next. Read them at random and you get vocabulary without a method. If you want the whole chain in sequence, start at technical analysis and work down.
How Red Box teaches this
Red Box Technical Analysis is an educational platform focused on technical analysis for scalping and day trading. We teach you how to read the market, prepare your charts and execute with a structured process. That process is taught in a fixed order, with a Discord community and tests that check you actually understood each stage before you move on.
That order matters because most trading education sells the last step first. Entries are entertaining, so entries get taught, and the trader ends up with a folder of setups and no way to tell a good session from a bad one. The Academy runs the other way around. Stage 1 covers the market and the vocabulary. Stage 2 covers the concepts you have been reading about in this hub. Stage 3 turns them into chart preparation you repeat before every session. Stage 4 is execution and risk, and it comes last on purpose.
Where this lesson sits. Everything in the Learn hub is free, and it is the vocabulary layer. The paid Academy is where the process gets assembled, tested and applied to live sessions with structured feedback in the Discord.
What to do next
- Read the lesson again with a chart open. Reading without a chart is entertainment.
- Mark the concept on one instrument, on five past sessions, using the replay function.
- Write one sentence per session describing what you saw. No predictions.
- Bring the questions that survive into the Discord, where the free area includes the no trading calendar and general chat.
Risk and what this is not
This is educational content, not financial advice, and nothing here is a signal or a recommendation to buy or sell anything. Trading involves substantial risk of loss and is not suitable for everybody. Past results, whether ours or anybody else's, do not guarantee future outcomes. Red Box does not manage money, does not take deposits and does not sell or endorse any broker or prop firm. Only ever trade capital you can afford to lose, and if you are unsure, speak to a licensed professional in your jurisdiction.
