Understanding OPK

Erin • IVF warrior. 🌈👶🏼 born 6/24/21 after 5 years.

So I can tell the 12th was my strongest line but what does that mean for ovulation? Does that mean I ovulated yesterday or will today or Saturday? Is this what apps call peak or high? Lol

BD 10th and 12th so far So should I also make tonight (10/13) happen as well? We we’re going to do every other night but the 12th just seems so certain. Did it already pass then or should I keep going and for how long? Thanks for any help!