If you want to trade ETH in the evening, you can pay attention to around 3880--3900 for short positions.
Playing this is really about managing your position well, strictly taking profit and cutting losses. Also, you must not get too excited; getting too excited will definitely lead to losses. I've been doing this for several years now, and basically, I make a profit every day. It's not as scary as it sounds; finding the right method is important.