the test line has to be as dark or darker than the control line to be positive for ovulation. this test is neg. And when you get a positive you will ovulate 24-36 hours after, in some rare instance you may ovulate as soon as 12 hours after the positive. so what i did when I got pregnant was start 2 days b4 my fertile window and had sex, then when fertile window came every other day, when got a positive on ovulation test did it that day and the next 2 nights to make sure I "caught" the egg. And another note just because you got a positive doesn't mean you WILL actually ovulate either. you can have surges and not ovulate... but good luck dear. I'm back to tracking and using ovulation tests again! trying for #4