Are you looking for a programming challenge or something? I've got an idea off the top of my head that I'd love to share but don't know what kind of experience you have/looking for.
I've had a theory for a while. Can you use technical stock indicators (such as bollinger bands/SMAs) on natural data sets such as crime?
The theory would say yes since the formulas used aren't specific to the market - they're just data. Its riddled me for quite a time and I think it could be valuable if true.
This would test your coding, API, mathematics, and economics skills for sure! Let me know if you're more interested in the idea.