I built Backtest[0], the backtesting tool for European index investors, as a way to analyze the historical performance of my portfolio of index funds. US invest

I built Backtest[0], the backtesting tool for European index investors, as a way to analyze the historical performance of my portfolio of index funds. US investors can use a tool called Portfolio Visualizer[1], which is really powerful and has tons of different analyses you can run on portfolios. But the funds and indexes that Europeans such as myself have access to are different. And then there's the currency you hold your investments in (USD vs EUR), which has a non-negligible effect on the historical performance. So I built Backtest to scratch my own itch. It's been growing more or less organically for the past 1.5 years though and currently sees about 500 visitors per day. I'm thinking about open-sourcing it but I've yet to thoroughly analyze the pros and cons, and decide on important things such as the license. [0]: https://backtest.curvo.eu https://backtest.curvo.eu [1]: https://www.portfoliovisualizer.com/ https://www.portfoliovisualizer.com/