Add this to your aliases:

/roulette-msg {
/writeini system\roulette.ini users $$1 $calc( $readini(system\roulette.ini, users, $$1 ) + $$2 )
/set %roullet-msg $addtok(%roullet-msg,You have betted $ $$3 and you made $ $$2 || $$1 have $readini(system\roulette.ini, users, $$1 ) ||,0)
/msg %bot-fun %roullet-msg
}