Looks cool at first glance. But these things are nearly impossible to monetize. I've tried... Many of these tools are out there and free. The limited history will cause a lot of users to run into roadblocks. There's over 5000 US listed ETFs now. Any serious back test will include the dot com bubble, the GFC and COVID market shocks, and much more. Looking at the last 5 years seriously biases your portfolio.