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Glossary

Open gap

An open gap is a fair value gap that price has not traded back into since it formed.

By Michael H.. Last updated . Corrections log

Definition

An open gap is a fair value gap that price has not traded back into since it formed.

Open is one of three states on this site, with touched and filled. A gap can be open at one moment and touched later, so the state always belongs to a time.

Open does not mean the gap will be visited, and it does not mean it will hold.

On a real chart

EURUSD15 minute3 bullish 3 bearish ยท 6 gaps by the rule
1.118001.119001.1200006:0008:0010:0012:0014:0016:00123456
  1. 1Bullish1.11769 to 1.11780formed 07:15 UTCTraded through at 09:30 UTC
  2. 2Bullish1.11838 to 1.11889formed 07:45 UTCTraded through at 08:30 UTC
  3. 3Bearish1.11888 to 1.11889formed 08:15 UTCTraded through at 08:15 UTC
  4. 4Bearish1.11846 to 1.11853formed 09:00 UTCTraded through at 10:30 UTC
  5. 5Bullish1.11802 to 1.11808formed 10:30 UTCNot revisited by 18:00 UTC
  6. 6Bearish1.11908 to 1.11918formed 17:00 UTCTraded through at 17:15 UTC
EURUSD, 2026-10-13, 06:00 to 18:00 UTC. Real candles: Dukascopy 15-minute candles, read 2026-10-31. Fair value gap by the three-candle wick rule, no minimum size. Each box runs from its gap until a later candle trades through its far edge, or to the end of the chart.

EURUSD, 13 October 2026, 15 minute candles, 06:00 to 18:00 UTC. The rule finds 6 gaps in this window. A bullish gap whose third candle opens at 10:15 UTC runs from 1.11802 to 1.11808, a size of 0.00006 in price. By the end of the chart price had not traded back into it, so it is open.

The window was chosen because it shows the term clearly. It is one chart, and it says nothing about what the next gap will do.

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