Clearblue advanced digital OPK

This is my first time using any OPK’s and I went with the clearblue digital that shows a circle if “low”, flashing smiley when “high” and static smiley when “peak”. I just started testing a week ago and today is the third day of being high but no peak. What has others experience with these been? Are they really accurate? Hoping for the static smiley soon!