Project: Build an easy to use tool for backtesting ETF portfolio combinations that you see recommended all over investment blogs. Let users have a shareable lin

Project: Build an easy to use tool for backtesting ETF portfolio combinations that you see recommended all over investment blogs. Let users have a shareable link to send around so others can easily see and tweak the portfolio. Start a blog around critiquing recommendations I find around the web. App: http://app.mytradelab.com http://app.mytradelab.com Blog: http://mytradelab.com http://mytradelab.com Problem: Would like to include details about holdings inside ETFs and how they change through time, but havent found a good data source yet. Would be cool to build in functionality to compare ETFs based on their fees and what they hold, but current holdings is just a snapshot in time.