No hindsight at all. I dont talk about the HOD LOD for the whole trading session, but the HOD LOD at the very moment. How do I know anything ? Of course there is no certainty in daytrading the markets. But from experience you will sooner or later (most people later, some never) realize that there are probabilities for certain scenarios, you will develop a feeling for it. If you see price blasting several points through the HOD LOD, of course you can do the same many like to do and go for the breakout, continuation. For me, that stuff never worked. Basically I do the same guys like Tom Baldwin already did in the 80s (without the frontrunning part): buy low sell high. Buy the panic, sell the euophoria, on a micro scale, several times a session.