Opening-range breakout on an expansion day
ReceiptThe expansion gate is armed and running in shadow at precision 0.4623 and lift 1.53× on the production rule, which is the honest operating point rather than the flattering one. The 0.5669 headline it was first quoted at read three features that can only be known after the fact, and one of them was the rule's own entry minute.
Entry
Let the first hour finish, then draw its high and low. The trade is a close beyond that boundary rather than a touch of it, because a wick through the level and straight back is the single most expensive thing this family does to you. Take it only on a day the strip above calls expansion; on a compression day the same geometry pays the whipsaw and keeps nothing.
Stop
Under the midpoint of the initial balance, which is roughly half of TR14 on a normal Nasdaq session. It matters that it is not tighter than that: the median adverse excursion on a winning momentum trade is −0.283 TR14, so a stop inside a quarter of TR14 is sitting in ordinary noise and will be taken out by moves that were always going to resolve your way.
Targets
Take one initial-balance width, then two. Give-back tolerance is the income on this family, because the mean trade reaches +0.4625 TR14 and keeps only +0.0656 of it, and every mechanism tried so far that takes the trade off before the bell has cost money rather than saved it.
What is real: the gate separates expansion days from the rest, and it does it before the trade rather than after. What is thin: at 0.287 gated trades a session the machine needs about 349 sessions to reach a hundred trades, so it will not have an opinion worth arguing with inside a year. You will have seen a hundred of these long before it does.