how soon can the opk line get dark?

Heidi • ttc #1, miscarriage 07/17, 11/17, and 01/18. beginning my clomid journey. 2 iui, waiting impatiently for a positive!!

I'm just wondering since glow is saying we will miss our window this month due to travel plans. I tested this evening and entered it manually. I'm at the lightest color possible that isn't white. theres around 10 lines of different color, all the way to dark for ovulation. my question is: could my positive ovulation day occur 10 days from now, or is there a slight chance it could happen in next 5 days?