Ovaulation

Za
So like u all know glow has first 27% then 33% and 22% and it just goes down after that. Just wondering, wich one of these is ovaulation day according to glow? Is it 33%? 
I don't take opks or temperature, so i just have sex every other day from period stop til it starts againg so i wont miss ovaulation. But just curious when it is according to glow so i "know" my dpo😊