M.R.
Have you been to www.fertilityfriend.com? I highly recommend that site for those who are TTC using a variety of indicators such as BBT, cervical mucus and position, among others. I do not know the exact answer to your question but I am confident that the site will be of great assistance to you. They offer about 20 different 'lessons' regarding charting, taking BBT, etc. and will actually have a bunch of different sample BBT charts and explain what all the rise/fall/sawtooth patterns/etc. mean.