Ovulation Test has been High for 8 days.

Jaclyn
I have been using the Ovulation Tester from Clearblue for the last ten days. My readings were: 
3/15 and 3/16 Low
3/17 High
3/18 High
3/19 High
3/20 High
3/21 High
3/22 High
3/23 High
It has the faces so I know I'm not misreading lines, but is it possible to have 8 days of High with no peak? What could it mean. Please help!