Trophies are awarded after each game that you win, and deducted after each game you lose. The number of trophies you win or lose depends on how many trophies your opponent has. If your opponent has more trophies than you, you will win more than you would have against an opponent with fewer trophies than you. You will lose more trophies if you lose against an opponent with fewer trophies than you, and lose less trophies when you lose against an opponent with more trophies than you.