Smart Scanners › Session and profile

The 80% rule

Open outside yesterday's value area, trade back inside it for two consecutive 30-minute periods, and — the rule says — there is an 80% chance of traversing the area. This fires on the second period and draws the value area as a zone.

What it looks like on a chart

A shaded band between the prior VAH and VAL, from the bar that completed the condition.

Settings, as they are actually applied on each timeframe. A dash means this scanner emits no settings string. Where a number differs by timeframe, that is a span of chart time resolved into bars.
Timeframe	Bars of history it reads	Settings	Events, last 30 days
M15	400	50 rows, session-low origin, one count per touching bar; 30-minute periods counted from the session open	123
M30	400	50 rows, session-low origin, one count per touching bar; 30-minute periods counted from the session open	111

Not on H1, H4, D1. It is defined in thirty-minute periods, so it cannot be expressed above M30.

Related scanners

Value area edge the plain first touch of the boundary that rule is built on
Naked POC the busiest price inside that value area, marked on the first return to it

Show 80% rule on a chart