American odds use a plus sign for underdogs and a minus sign for favorites
Positive odds show how much profit you make on a 100-unit stake
Negative odds show how much you must stake to win 100 units
Decimal odds show total return per 1 unit staked
Fractional odds show profit relative to stake
Implied probability converts odds into a percentage chance
Lower negative odds mean a stronger favorite
Higher positive odds mean a bigger underdog
Point spreads show the margin a team must cover
Moneylines show which side is expected to win outright
Totals show whether the combined score goes over or under a set number
Odds can change based on betting action and market movement