Connect a Sleeper or Fantrax league to turn The Trade Calc into a tool for your specific league. For Sleeper you can simply enter your username and pick the league; public leagues need no login.
Once connected you get League Insight: power rankings of every team by roster value, a trade matchmaker that builds fair deals with any other team, waiver-wire value targets, and per-team draft pick ownership. Your connection is stored only in your browser.