Opk help?

Deanna
This is my first time using an Opk and I'm having a tough time reading them. 
I started using them, per the 
instructions, on cycle day 10, which was Thursday. 
I took one Thursday, Friday, Saturday, Subday morning and Subdsy evening. According to Glow I should ovulate Monday. Do any of these look positive to you? The instructions say the line should be as dark as the control but I don't feel like any of them are.