This is actually an awesome idea -- almost like a forecast of the money you'll earn? Should be simple to do it programmatically. I'm going to add something to our feature list to explore this.
I've got a question about the current dashboard: by default, "Today's Volume" seems to include more than today. "This Month's Volume" also seems to include more than this month (the range goes to the end of this month). How are these figures actually calculated?
Edit: you can email me directly, alex@indyhall.org, if you'd like to talk more about this off-forum.
https://github.com/Swizec/Personal-Runway
Have been trying to come up with a way to turn this into a product for over a year now. A service for SaaS owners ... might not be a bad idea.