Opk help please

Here is what I am thinking. Please let me know your opinion. I was put on clomid this month and this is the first time I have really been tracking my ovulation. 
Everyday that I tested, I didn't think that I ovulated. But now that I put my tests all next to each other, I think I did in fact ovulate. 
Looking at each test, the line was never darker then the control line. But as you look towards the top of the row, you see the line become darker and then faded out again. 
I am assuming that I ovulated during those two days. Even though my lines never were darker then the control. Am I correct in that thinking?  
Please comment your opinion. :)