I also looked into it, but it does not fit my style, tbh. I trade short term and rely on liquidity to get my fills.
The biggest advantage is the lack of algo action, especially those anoying ETF - Arb bots that flip bid/offer a million times without trading anything. The correlation bots are still there though.
The problem, however, is the fact that nobody trades. So while you are free to hit bids/take offers with 50-100 cars, nobody is taking your market.
It's like 200 cars are on the bid, offer is 150 cars, 5 contracts hit the bid and it immediately goes offer...sits there for a couple of seconds and blips back up again, whereas during RTH there is always this small mini puke into the next bid/offer where you can get in or out. So for short term trading your only edge would be correlation where you take the market when the ES is lagging...good luck against the robots though
Until you trade medium term, e.g. intraday swings, you will have a very hard time to manage your risk. There's just nothing to lean on or to get out on a backtick.
Also, when a move happens, it's most likely a low liquidity blip in correlation with the Asian/EU markets.
So AH looks pretty on a chart, but the market is a mess in reality. The chart posted above suggests that most moves happen overnight, but misses the fact that most data was recorded during times when the EU was on the verge of a breakdown with the mess in Greece, Italy and
Spain. So of course there was a lot of action in the EU session...which translated to AH volatility in the ES.
If you really want to enjoy a sleep deprived live without friends, I'd suggest you trade the EUREX contracts, primarily FESX. Truckton of liquidity, cheap exchange fees, not as hard to read as the ES and good correlation with FDAX, FSMI and 6E.
Just do yourself a favour and stay away from FDAX and FDXM...those contracts are a nightmare from a risk perspective and kill accounts pretty quickly if you make a tiny mistake.
Besides that, I'd suggest to stay on your home turf and keep normal hours. The US has a gazillion products and there's something for every taste and background. If the hours collide with your schedule, trade KOSPI or the Mini Nikkei, which should be active during Cali evening hours.