Thanks! So you think the light lines are like the work up to o? I have heard it's not and they don't mean anything but it is weird I only get them the couple days before o.
That's exactly what I think. My thoughts are: the advanced digi says it will give you a low (negative) high and peak reading. High means more LH but not the full surge. the digi does it by reading the LH in your urine. I think the cheap sticks can be read similarly, the test line darkens as more LH and then reaches the point of being darker than control.
Since I stopped bc in February I have tested every dat sometimes twice a day just to try to figure out my body. The line pattern for me was consistent every time. Pure white, then slowly very faint lines came then slowly darkening over the course of several days until positive.
I use those lines to know when to start using the digi so I don't waste them. I use cheap until I start getting good light lines but not + then I use digi or both to confirm. It's a little obsessive but I have longer cycles (36ish days) and missing one means another 5 weeks. That's a long time.