Would a line still appear on OPK day of ovulation?

I took a $1 cheapie OPK Yesterday and the line was there but not as dark as the Test line.

Then late this morning And again after dinner I took another test and the Control line is stark white. I did feel myself ovulate today which I think is a day or two earlier than usual.

But I never had a blank! Do you know if this means I ovulated? i would think some sort of line would have showed on day of ovulation, no???

Thanks!

Re: Would a line still appear on OPK day of ovulation?

If your control line does not appear then the test is invalid. The control line always appears.