Session Gap Fill
By LuxAlgoOct 8, 2025
Session Gap Fill watches the handoff between trading sessions. Whenever a session opens away from the previous session's closing price, it marks a bullish gap (open above the prior close) or a bearish gap (open below), then follows each one to record whether price returns to that prior close - the gap-fill event - or leaves the gap standing. What emerges is a statistical picture of how your market treats its opening dislocations.
How to Trade the Session Gap Fill?
- Filled vs unfilled: a quick fill shows the market rejecting the new opening prices, while a gap that stays open signals acceptance of the sentiment shift it expressed. The reaction, not the gap itself, is the information.
- Overlapping vs non-overlapping: overlapping gaps - where the new session's first bar shares price levels with the prior bar - behave differently from clean breaks, and the Gap Type filter lets you study each population on its own.
- Dashboard columns: Gaps (bullish vs bearish share), Filled (fill rate by direction), Reversed (how often a filled gap turns back in the gap's original direction), and Bars Avg. (typical bars until fill).
Session Gap Fill Settings
- Gap Type: analyze all gaps, overlapping only, or non-overlapping only.
- Dashboard / Position / Size: toggle the statistics panel, place it, and scale it.
- Style toggles: visibility and colors for filled bullish, filled bearish, and unfilled gaps, plus the Max Deviation Level and Open Price Level overlays.
Frequently Asked Questions
How exactly is a gap detected?
The indicator compares a session's first-bar open with the previous session's last-bar close. Any difference registers as a gap - bullish when the open prints higher, bearish when it prints lower.
Can the statistics tell me which gaps to fade?
They describe tendencies, not certainties. Fill rates, reversal rates, and Bars Avg. show how each gap type has resolved on your instrument - context for judging whether fading or following the open has been the more common outcome.
Is Session Gap Fill free to use?
Yes - it belongs to the library's free collection. If session statistics are your thing, Session Streaks gives the same data-driven treatment to session direction itself.
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