The plus and minus symbol in a spread bet can have a couple of different roles to play. It is most common to see these symbols used with points spreads. Next to the individual team, you will see a plus or minus number representing the handicap that they must overcome in order to make the outcome evenly balanced. You will also see -110, for example, which is the moneyline bet and means that you'll need to place a £110 bet to receive a £100 profit.