If one lives in US the best market to trade off hours is KOSPI 200 futures. Extremely liquid with great intra day range.
Overnights can be a coiled spring. On the right nights you can get in with small stops and get a solid move that lasts until Ny close. These strong moves can be harder to grab during the day in a high levered position. The fakeouts are stronger. Days will always have more points to grab. But if you have clear trade to make, even if for only one day, a night entry can be great.