Help with Clearblue Advanced Ovulation kit

Kaci

Okay so I previously tracked with opk stops but just didn’t feel right with them. Finally switched the Clearblue digital opk and after 7 days of high results (flashing smiley) I finally got a peak (solid smiley face). Is this normal? I thought it was supposed to be only around 4 days of flashing smiley before it peaked?