How do I know when I am ovulating using glow?

Morgan • Mommy of a 3 year old, red headed, amazing little boy named Brooks and a 1 year old sweetheart daughter Quinn, who we call Q! Due with baby #3 in May 2018! 💕💙
6 or 7 days are showing up green for my next fertile period but does glow predict the day I am actually ovulating? Or I guess how will I know according to glow what day that is?