I got the idea from Google Stock Charts. Sometimes, I will input how many messages I have received. Once this happens, you can come on and Press D, W, M, or Y to get the amount, and when message counts shot up or stayed down. Press D for the last 24 hours. Press W for the last 7 days. Press M for the last month (31 days) Press Y for the last year (365 days) Once you have pressed one, press I and O to zoom in or out. Enjoy!
Inspiration from Google Stocks All code by me To add: +When your mouse touches the line, it tells you the value +Text!