You could use this, it should work but it has not been tested
on death of player: set {_max} to {balance.%victim%} set {_amount} to {_max} / 2 send "&a&l+ &aHalf players money!" to attacker send "&c&l- &cHalf your money!" to victim add {_amount} to {balance.%attacker%} remove {_amount} from {balance.%victim%}