FYI, the test the OP references can only be the ClearBlue Easy Advanced Digital OPK. It is their only ovulation test that will display a flashing smiley. Their other digital ovulation test (the not "advanced" version) will only display a steady smiley to show that the LH surge has been detected, and is not designed to display any result for estrogen.
A flashing smiley on the CBE AD OPK means that an estrogen level significantly above the women's basline levels has been detected. The average number of flashing smiley days - high estrogen days - detected by this gadget prior to a peak (shown by the steady smiley), is two. However, it is not uncommon for a woman to have four or more days of high estrogen detectable by the device prior to an ovulation attempt.
In this case, the woman does not understand how her device works. She is not having a long LH surge. She is having a longer build up of estrogen prior to an ovulation attempt.
If for some reason the monitor does not detect an LH surge, the device will continue to display the flashing smiley while it awaits a "peak" that doesn't come. Some reasons for the device not detecting an LH surge are: * poor testing technique, * missing the window of opportunity (testing in the morning is recommended so the woman can use the first morning urine, ensuring it's sufficiently concentrated for good hormone detection, but the best time to detect an LH surge in the urine is usually the early afternoon), * an anovulatory cycle.View Thread