boredo thanks for the feedback ! I've made a note of it.
As for the crazy returns, the way the leaderboard is currently calculated (might change) is through a measure of cash + investments. This shows you overall how much a user has made relative to their account size. There is a short-term limitation: if you have 1000 MPH and invest it all in a market with 10x leverage and it drops 9.9% - you have an unrealized loss of 99% of your account, and have 1% of it left. If the market rebounds back and the perfect amount of time passes, then you will see a very high return because it's relative to that remaining balance (right on the verge of liquidation). Over time this return is smoothed over the weekly and monthly time periods.