Never seeing peak opk

[joannag182]

Last few months using opks. I see them getting darker but not seeing a peak. I test twice a day and three times when they start to get darker.
Seen mixed things that some people never see a peak and believe to be ovulating. many thoughts or advice?

 

[OnErth&InHvn]

This baby, I got a high but never a peak and still got BFP.

 

[nessaw]

With my dd I only got a high, no peak that month.