For me it’s about finding the sweet spot where you have high levels of market activity and volatility because this can be ripe for short term trades. Good examples of this are when the market opens and closes.
But beyond set times you need to factor in any scheduled announcements like earnings reports. Also, are you following news related to the sector you’re interested in? The other thing is when can you actually trade? It needs to fit around your schedule or vice versa.
Juan