When exactly do I ovulate?

I had a peak test today. Super duper dark. So does that mean that I am ovulating right now?? Or does that mean I will ovulate later today or tomorrow

Do you have dark lines when you actually ovulate or is it just dark lines right before you ovulate??

We’ve been BD every other day so We will BD tonight. But I’m just curious. Like do I need to BD ASAP or is waiting until tonight okay??