Opk, how does it work?

s • 28, anxiety, pcos, 6/8/18 👼🏼, rainbow 7/23/19👧🏼🧁, 5/13/21👶🏻🌙, 4/25/22 👼🏻

So I had no line at all on cycle day 7 or 8, today is cycle day 9 and I have a very faint line. I'm three days out from my last pill of clomid. So the closer I get to O the darker the line should get? Until it's as dark as the control line correct? Then bd every other day for 5 days?