What are American odds and how do I read them?

American odds (also called moneyline odds) use a plus or minus sign with a number. A minus sign shows how much you must bet to win $100 — so -150 means bet $150 to profit $100. A plus sign shows how much you win on a $100 bet — so +130 means a $100 bet profits $130. Favorites have minus odds; underdogs have plus odds.