Well krissy covered it all,if you want to look at my chart as an example..
http://www.fertilityfriend.com/home/1d61c2
charting is so good,you know so much,and in time you know exactly when to expect af good luck...
first of all, i am glad you are charting. it is a very smart thing to do. everyones highs and lows are different. my lows before ovulation were between 97.1-97.7. the day after ovulation i would spike about 5 points up and then jump around between 97.8-98.8. make sure you take your temp the very first thing in the morning... and try to do it the same time every morning. do it before you do anything else...don't speak, don't drink water, don't stand up, don't pee.... i would set my themometer on my alarm clock and take it first thing before anything else. i enjoyed charting. it was exciting and it really helped me learn my cycle and predict ovulation. also, be sure to chart your cervical mucous. i got a lot of info from a book called, "taking charge of your fertility." it was recommended to me and i recommend it to everyone! good luck to you!!!