Charts are based on your user profile data and will let you see your progress in 3 separate views. Routine duration shows your stats in relation to the routine duration you're performing at the time. Past week will display your stats over the last 7 days, and Past Month will display your stats over the last 30 days.

To switch between the different statistics recorded in your user profile, simply touch the Weight, Waist, Height, or BMI buttons at the top of the Charts screen.