Some observations to ES "tactics" : take a look at 5 min chart...812.75 broken...2000 lot sell order..."coincidentely"...
Some algo must be written with one code line : if ES sell vol > 2000 then buy market order 5000 lots. End of story.
today I don't think ES is pumped up since its Europe that takes the lead. The way Dax trades makes me think we could see major rally today in US. But since I expect a short drop at open I covered my dax long for a nice 100p gain. Will reopen later and also take a long position in ES. good luck