Trends/Gaps and breakouts

Gap fill

Price returns and trades through the whole empty space of an earlier gap.

Gaps and breakoutsBest on 3M, 6M, 1YAlso called filled gap

Illustration of the gap fill shape. It is a sketch, not real price data.

What it shows

A gap is filled when later bars trade through the whole space between the previous close and the gap's open. For a gap up, price falls back to the earlier day's high.

We show how long gaps stay open in the stock's own history.

How we find it

The same code that draws it on your chart follows these steps, with the same result every time.

Find a gap, as defined for gap levels.
Track each later bar.
Mark filled when a bar's range covers the whole gap.
Show bars until fill.

Starting values: Gap ≥ 1%. These are proposed and will be tuned on real price data before launch.

How to read it

The gold zone is the gap.
Price later returns into it.
The gap is closed at the gold dot.

Status labels you may see

Label	What it means
Open gap	Not filled yet.
Filled	Filled after N bars.
Partly filled	Price entered it but did not cross.

What cancels it

Closed when the whole zone has been traded.

What traders check next

How many bars until fill.
Volume.
Gap size.

Limits

Some gaps are never filled.
Large gaps can take years.
The 'gaps always fill' saying is false.

Try it in forecastviz

Open any ticker and choose Gaps and breakouts → Gap fill in the left menu.
Switch between 3M, 6M, 1Y to see how the picture changes.
Compare with Gap levels and Breakaway gap on the same chart.

Open on a ticker

Questions

Do all gaps fill?

No. Many do not, and some take years.

How long does it take?

We show the stock's own history.