[TTCin2010]

I got the ovacue monitor and started using it on CD3. Today is CD 11... On CD 9 I got my peak which says my max fertile day is CD 13. Today I took an OPK, and it was neg (very faint line). Do you think the monitor is right? I plan to use another OPK tomorrow.

When I have used OPK's before I typical got a + on CD 13, and O on CD 15.

(We're not trying this month bc dh just had his surgery)

[Halfbaked]

I have no idea on the monitor but I have heard that they take a cycle or 2 to adjust and work right. It's good that you are still using OPKs and will be able to pinpoint O. That way, when you are TTC, you'll know if the monitor is working correctly or not.
Good luck!