The Leaderboard shows daily/weekly/monthly ratings of opted-in traders.
Traders are ranked by consistency. This is difficult to do within a single day so it works as follows:
Daily Leaderboard - ranked by P&L. Updated every 5 minutes.
Weekly/Monthly Leaderboard - ranked by consistency. If 2 traders have the same consistency ranking, the one with the highest P&L will be ranked higher. Updated every evening.
The consistency ranking comes from the proprietary trading world. It is based on the criteria certain prop firms use to decide if a trader can go live.
The data on the screen should be self explanatory. Note that traders can opt to share their position data as well as their overall P&L. The red arrows point to where you can click to see that data if it's available.