Click on "Link existing tournaments" and select each tournament you want for your power ranking
Step 3: Link tournament players to your league players
Go to page "Players" in your league
Click on "Link from tournaments players"
For each tournament players, you can create a new league player or link it with an already existing league player. In the most case, for the first tournament, you create new league players, and for the next ones, you link most of the tournament players with an existing league player.
Step 4: Generate your power ranking
Go to page "Ranking" in your new league
Click on "Add ranking type" and select one
Update ranking by using the dropdown menu at the right of the list.