Before you place a bet at a sportsbook, you need to understand how the odds work. Sportsbooks try to balance the amount of money placed on either side of an event, by setting the odds in a way that reflects the probability of the event happening. For example, if you bet on a game with a 50-50 point-spread, you will only win 50% of the time. This leaves a 4.5% profit margin for the sportsbook.

The point-spread is the spread between the two teams in a game. It is set by a sportsbook and is based on several factors. In most sports, the spread is 0.5 points on each side. This is to account for home field advantage, which is worth two to 4.5 points.

## Moneyline betting

A moneyline bet involves placing your bet on the winner of a game or event. Generally, moneyline odds are determined by a sportsbook based on the implied probability of the team winning. The odds for a moneyline bet can fluctuate significantly, so it is crucial to monitor the odds at your sportsbook. Typically, moneyline odds are higher for the favorite than for the underdog, but you should always know that not all teams are created equal.

## Alternate lines betting

Alternate lines betting at a sports book can make for a profitable betting strategy. These bets are often available on a wide range of teams. For example, if the original over/under was 7 runs, you could place an under bet on the alternative line of 8.5 runs at a price of -240. While this is not a guarantee of a winner, it is a great way to get value on the underdog.