I would like to be able to manipulate the graphs so I can see a particular period of time, as well as since I’ve been a member.

Nannyhils – without knowing exactly what is an issue for you, does it help if I say that the numbers down the right hand side are to do with length eg waist measurement etc while the ones down the left hand side are weight (in my case, kilograms, but maybe you use stones or pounds?)?