Defender invest contains several tools for personal investments.

1. Percent calculation - calculated yearly % from % for period of given 2 dates
2. Rebalance - a tool for portfolio rebalance that allows to rebalance leveraged investment portfolios
3. [Work in progress] Spreads - spread backtester

For Percent calculation / Rebalance See README for frontend folder for more technical details. For Spreads Backend see backend folder README (Work in progress).