Well I’ll be a piss ant. 40 grand to trade a micro es? I mean like it moves a buck .25 a tick and is mean reversion. Give me a break! If I can’t do better than that then best make haste and take to selling bubble gum on the street corner.
Are you missing his point? He is establishing a rule relative to the size of his account. So if his stop is based on the ATR and wished to risk only 1.5% of his account, he'd need, yes, $40,000.
You are doing the averaging-in thing though, so you have a different perspective.