Quote from NoProblem:
I've been trading pre / after hours for about 9 months on and off, there are definite differences from RTH but not much difference as far as difficulty level - jmho.
As for "who" is trading then, I never gave it much thought but I suspect it's mostly retail and non-USA traders, somehow when a news event hits tho, traders come out of the woodwork lol.
I'm outta my short now @ 861, but 859 is next level lower to watch for - for whatever that's worth to ya.
On Sunday evenings, seems like ES likes to move in the same direction as Asia, at least for a while.
About 3:00am Eastern time volume usually kicks up a bit.
I trade small, but seems like trading 10 - 30 contracts at a time is no big deal and you could easily get in and out, usually without worry, bigger positions probably go for more of a swing trade - jmo.
Steve