Question: is there a way to view my investment balance over time as a chart? The past 30 days would be great to illustrate my question.
Not currently, but I can show you the overall site profits over the last few weeks. Your investment balance will go up and down with the site bankroll.
The vertical gridlines correspond to midnight Sunday UTC, ie. when commission is taken. You can see that yesterday there was a big drop in profits (due to Doctor Lee martingaling a small deposit up to 900 BTC!) but I don't see the same thing on previous weeks.
Edit: replaced chart with up-to-date one