src/de/steamwar/bungeecore/comms/handlers/FightEndsHandler.java

@@ -74,7 +74,7 @@ public class FightEndsHandler implements SpigotHandler {
     }
 
     private void calculateEloOfTeam(int schemId, int eloOwn, int eloEnemy, double result, List<Integer> players, String gameMode) {
-        double winExpectation = 1 / (1 + Math.pow(10, (eloOwn - eloEnemy) / 600f));
+        double winExpectation = 1 / (1 + Math.pow(10, (eloEnemy - eloOwn) / 600f));
         SchemElo.setElo(schemId, (int) Math.round(eloOwn + K * (result - winExpectation)));
         for (int player : players) {
             int playerElo = UserElo.getEloOrDefault(player, gameMode);