Graph about past value of portfolio

[akmaekki]

Maybe it would be interesting to show how the current value of portfolio compares with past values, e.g. one year ago. This would require to download past values of the stocks that constitute the current portfolio. Could be sufficient to download weekly results (or make it configurable to daily, weekly, ... results). Also, such a feature would make most sense, if the program is not run in server mode (loop mode).

[lukstei]

Sounds like a great idea - feel free to provide a PR for it