Ovulation test moron here

Hey ladies, I was wondering if I can see some pictures of what a positive ovulation test looks like? I've been using First Response tests and I have yet to see a line that is as dark or darker than the test reference line as the directions indicate. Many times it has seemed close to me, I don't know if I'm just looking too deep into this, if I'm missing my ovulation day each month or just don't know how to read the test correctly. Any pics, tips, and advice is welcome and appreciated.