Trade History keeps the trades you save in Trade Lab and also shows the trades that have already happened in your Sleeper league. Each one is graded again with what we know today, so you can see which deals aged well and which did not, and who in your league has been winning the trade market. Use it to learn what your leaguemates value, or to check a deal you made earlier in the season. Your saved trades stay on your device unless you sign in to sync them.