Guidance on developing a feature

[castroflavio]

First of all very cool project.

Could anybody give me some guidance maybe a direction.

Personally I manage my finances with Excel, but something like this could be better.

One of the features I have in my personal finances is calculating my portfolio allocation as well as defining a target allocation. It then computes the difference and I use that to rebalance my portfolio.

Let's call this a portfolio allocation and rebalancing feature. Would it make sense to create an app with this functionality? Why and why not? If so then how would I go about that?