I'm not sure. But I think you can look at the Charting Forum and there is a tutorial thread sticky there.
Liam Matthew is here!! 10/18/2012 9lbs 6oz 20 inches
Big Sister Erin Grace - Feb. 2010
I agree that TCOYF is a great resource.
To shorthand it though, the gist is you get a drop in temp when you O and then your temps go up and stay up post O, usually until AF arrives when it comes back down to base a gain. You are talking with in tenths of degrees though, so it's important to have a BBT thermometer that has 2 digits after the decimal. I tried it for a while when I first started charting with a regular thermometer and didn't get very good charts that way.
If you chart on FF, you can also search out other's charts to see what different scenarios look like. Just keep in mind that no other chart will look exactly like yours, but you can see how the patterns change.
Good luck this cycle! KUP!