Clear Blue High Fertility question

As a piggy back to my previous post (opk help for a newbie, posted yesterday evening), I have a follow-up Q for you all...

Will the Clear Blue Advanced Digital test ever display the blinking smiley for high fertility if ovulation has ALREADY occurred? Or is it only possible to get that result PRIOR to the LH surge/ovulation? It says it detects a rise in estrogen so I’m assuming it can’t detect that much estrogen post ovulation but I wanted to make sure...I’m afraid I missed my ovulation, but not sure if that’s possible if the test is detecting high estrogen.

Thanks!! :)