Hey guys I'm in first yr Uni and I've just started day trading....

Hey guys I'm in first yr Uni and I've just started day trading. It's obviously announcement season ATM so there are a few big ups and downs. I've got a rookie question for y'all.

When there is a share with a results announcements before the market opens, do we buy shares the previous day before ASX closes or put an order through to buy the shares after the result comes in (assuming it's a good one). The previous day option would get us shares at a cheaper price (maybe save 1-3%) but we're cooked if its not the right outcome. If we put an order through after the result before ASX opens, we'd get it at a more expensive price which isn't the best for a day/short term trader.

Thoughts guys? Would love everyone's opinion