Always close and open prices are recorded. intraday high and low are not as important as open and close are.
Dip below 55 and we're likely done above for the day, but viewing this as a pullback for now which likely will be bought. One last squeeze going into the Close. NQ's such a drag lately, though. So, it could definitely kill this for today. Ultimately, I think we'll see lower prices before this correction is over. But that's just guessing.
Further, you just bought the 35 sim-ES in your DU papertrader account, otherwise you would not have redacted the marked PNL. It shows that you're entirely FOS. Not only is it a DU-account; you just bought ES in your sim-account to satisfy your claims in this thread. No reason to redact the PNL if you had bought ES in the sim last night at the open.
Important for what may I ask? As a day trader, the ultimate goal is to buy the low and sell the high or vice versa. The dip from the top or the bounce from the bottom would be a bonus. As such, the actual Close is less important. Within a predictive model or similar, the Close may be important. No arguments there. Anyway, that's my humble view and concern. And who am I to argue with someone who's trading 35 ES contracts.
Important for what mass people see and hear about the market and what causes fear and greed. You are right about day traders. You hear in the new that S&P closed 0.5% up or down today and they don't mention intraday high or low. A regular employees , a dentist, doctor or a teacher who gets greedy or fearful reacts on the market close and not based on intraday fluctuations.
One could argue that this group generally gets it wrong. In fact, if you buy after a < -1 % down day your odds and average return would be greater than if you bought after a > 1 % up day. This is looking at a broad sample of course.
Looking at the hard data, this Monday was an up day closing green with the prior Friday being down. Leaving out some minor details, this gives very good odds of continuation higher tomorrow and a green close. So, I'd say this leg up continues tomorrow - hitting maybe 5100 on ES. I am however thinking we're not yet done below, so we could see a reversal come Wednesday. If not, maybe next week. Did you exit?