please give me some insight!

I would like for those who have taken their bbt for a while to post pictures so I can see what exactly I am looking for. Right now af is still here and I've been testing since day 1. I tires OPKs last month and I never got a true positive so not to waist money this month I've decided to track temp and then next month or the next I will like to use the opk in relation to my bbt.