OPK test accuracy. ?

Shosh

Hey guys. So I’ve been using the cheapie amazon OPK tests to track. I am a little confused as to some people are saying different things about them.

When the tests say I’m “ovulating” ( test line darker or same as control line) does that mean I am, at that moment , ovulating, am I about to ovulate or have I ovulated already? Really don’t want to miss my window this month, as it will be my fourth month TTC baby #1. Thanks !