Hi Luc, a little off topic but Im really curious.. would it be a bad idea to leave day trading buy orders on overnight?

I have a feeling Ill miss my sell window and it will just collapse by the time I wake up, so I just cancel all my buy orders when I want to go to sleep...

Anyways yeah... leave buy orders on overnight or cancel them? (specifically "account builder" type orders)

Edit: In fact, leaving my computer in general seems kinda sketchy... I have alerts set everywhere but who knows... Am I right in assuming that day trading is specifically meant to be done sitting in front of the computer constantly monitoring every trade?