An ADX volatility gate for prior-day breakouts

How the pieces fit

This archive article reconstructs a historical daytrading workflow built around a 14-period average directional index, a prior-day high, a nearby protective stop, and an exit when the ADX line turns down. The conditions below are those of the archived procedure.

The average directional index is used here as a 14-period strength reading that marks expanding volatility and whether a trend is strong enough to support an entry. The 40 ADX level is presented as a decision-support threshold chosen after years of testing, used to judge whether trend strength is sufficient to generate an entry.

The scan and the 40 threshold

The scan is limited to names priced between $20 and $70 and uses a 14-period ADX that has remained below 40 while rising into the prior close. That overnight state is the filter that makes the later opening-window cross meaningful.

The procedure is withheld from speculative, low-float names priced under $10 because of choppy, inconsistent tape and thinner volume.

The opening confirmation window

In the first 20 minutes after the open, the setup requires ADX to cross above 40 and price to break above the previous day's high. Both checks belong to that opening confirmation window. They are not treated as separate sessions.

Those two opening-window conditions are used to place a buy-stop entry $0.20 above the then-current price. The offset buy-stop is the entry once the ADX gate and the prior-day high breakout are both in place.

An optional plus directional cross

An optional confirmation is a plus directional-movement line crossing above the ADX line while ADX is at a two-day high above 40. The archived workflow records that plus directional cross as confirmation, not as a replacement for the opening-window pair.

Nearby stops and failed breakouts

Protective stops on names in the $20-to-$70 band are specified as no wider than $0.20 to $0.40, and often tighter. That nearby protective stop is set with the entry so the loss bound exists before the position is working.

A two-day-high breakout is treated as invalidated if price reverses back into the previous day's range. Prior-range reentry ends the breakout case even if the ADX reading has not yet rolled over.

Adds, then the ADX rollover

While ADX is still rising, the procedure allows adding to a winning position in increments of about $0.40. The rising-ADX add-on is withheld once that line is no longer advancing.

The planned exit is triggered when the ADX line begins to decline after having risen. That ADX rollover exit is the scheduled leave, independent of a new high in price.