Charting and OPK

[PizPizPiz]

Hello ladies,
For those of you who are charting their fertility signs Toni's way and using OPKs at the same time, did you find that they always agree with each other about the date of ovulation? I'm charting and now considering getting OPKs as well but not sure if it's worth it.

If your periods are at all irregular it is not worth your while either doing charting or opk's.

yes i chart and opks stick they work together with me but like attila says if your irregular, it could not work for you