The – and + in sports betting indicate the potential of the outcome. A – symbol indicates the more favourable outcome. So, if a team is -140 to win, they would be something of a sizable favourite. For spreads and puck line betting, it indicates what margin of victory or loss must be achieved. For the + symbol, we know that this is the less favourable outcome. The larger the number, the more likely/unlikely that bet is to cash.