Halfway between day high and day low would be a fair bet.
I play options and I just bought 330 calls when stock was 329. I paid $3 per options.
If stock closes at 334-445, I will get like 100% gain but I will hold until tomorrow near the close.
I expect it to close green tomorrow too, maybe $5 higher, to $340.
If it closes red tomorrow, I will come out even by this time of day, if it will close green tomorrow, I would make around 200% at closing.
I make my money trading short term options so I watch stocks very close. Usually I buy at lunch time. That's when intraday low are usually set.
If it goes lower one hour later, I am out, losing about half of my money and call it quit for the day.
If it bounces, and it usually does, I shoot for 150 to 200% gain.
It's easier to trade short term than long term. If long term, I look for a year or more down the road.
Short term works a lot better. You can look at 15 minute chart and see which way stocks are moving.