Question about some time points during a day

Hello everyone, a new member is here. The question I am about to ask is probably too elementary, but having searched for the answers I could not find a good one, so I am turning to the trading professionals. Here is a brief background: Ph.D. in theoretical physics, experience with non-linear and chaotic systems, started a small prop shop, trading e-mini Dow, holding time between several seconds and 3 minutes, so far so good (knock on wood). Now the question itself. Having traded for almost 6 months I noticed that there are some times during the trading day when the "internal behavior" of the e-mini (and Dow itself) changes. Some of those points in time is obvious, for example: 11:15-11:30 (Euro markets close), 15:45 (end of day imbalance). But I also noticed that there are some internal changes on or around such times as 09:45; 10:15; 10:30 (pretty noticeable one). There are also other points in time, that sometimes are less "pronounced", but still noticeable enough: 12:30 (not always, but quite often); 13:30 (the same - not always), 14:30-15:00. During the last time frame the to the behavior may or may not occur, but if they did, they are quite slow compared with the time frames I operate with. So, here is the question: does anything happen regularly on or around these times (time frames) like massive closing of stop loss positions, etc.? Would greatly appreciate your comments. Thank you. Cheers!