My FS recommended that I use the OvuQuick OPK whish are 44.00 for 9 test. Timing is everything and I am going to have a IUI. I went to have my CD10 scans yesterday and I do have a follie at 20 so I figured it will not be long before I surge. I usually surge around CD16 but I'm on Clomid this cycle. Anyways, these expensive OPK sure do look like a positive. My notes also say that doesn't matter if half a line or a thin line that if it is the same color it is a positive. But I went and bought a digital and it was negative. I have to take my HCG trigger shot if I do surge before my next appointment on Tuesday. Like I said, timing is everything. I hope some of you are taking these test! Reading these things really suck! First test was my 2cnd morning urine, the second test, I held off for 2 hours.