To pee or not to pee...

I found this super helpful chart. You pick your DPO and it tells you the odds of getting a positive result if you're pregnant. This has been helpful for me in getting me to hold off and wait since getting a false negative is so likely up until my period is due. Has anyone else tried this chart? http://www.countdowntopregnancy.com/pregnancy-test/results-by-day-past-ovulation.php