The second number in our example (-110 for both teams) tells you how much you have to wager in order to win $100. It’s an easy way to calculate how much you’ll win if your bet pays off, presented in units of $100 at a time for simplicity’s sake. Most of the time, these two numbers will be the same, because oddsmakers want to set lines so that they get as much action on the underdog as on the favorite, guaranteeing them a profit. If a book gets a single bet of $110 (by a customer hoping to win $100) on the Cowboys and a single bet of $110 on the Giants, it will have taken in $220, but will only have to pay back $210 to whichever customer wins the bet. That’s a guaranteed profit of $10, and since sportsbooks take far more than a single bet in either direction, they stand to earn that seemingly small amount of profit many times over. The $10 difference between what you wager and what you win is known as juice or vig in the sports betting industry, and it’s the way books earn their bread and butter.
As we did with the underdogs, we need to figure out how much we will profit for each $1 that we wager. For underdogs, we divided the moneyline number by 100. For favorites, it is the exact opposite. We will take 100 and divide it by the money line number. So, for this example, we will take 100 and divide by 155 and get about $0.645 or about $0.65 in profit for every dollar that we bet.
Because the Blue Jays are favored, the sportsbook needs you to risk more to bet on them. After all, they should win this game. So wagering on baseball favorites with moneylines calls for you to risk a certain number ($185 based on -185) in order to win $100. On the other side, the sportsbook is also willing to reward you for taking the underdog, so they give you an incentive to bet on the Orioles. In this case, you would risk $100 in order to win $165 (+165) on Baltimore.

When betting on the underdog, the first step is the same. Divide the positive moneyline by 100, which in the case of the Grizzlies in the above example would give you 2.10. Then, multiply your stake by that number to get your potential winnings. $450 multiplied by 2.10 is $945. Essentially, this means if you risked $450 on the Grizzlies, you would stand to win $945.
Bookmaker's interest - In order to guarantee a profit for the house, a bookie needs to create even action on both sides of a particular game. In a perfect world the bookie would have 50 percent of the handle come in on the underdog and 50 percent on the favorite. This ensures that the sports books are guaranteed a profit because of the 10 percent commission or "vigorish" charged on most sports wagers. This is why there is "movement" on the point spread. If one side on a game is being bet more heavily, the bookie must move the number in order to attract interest on the other side in order to balance action.
Sports betting has become a popular pastime and with the offering of many online sportsbooks, punters from all over the world can engage in exciting betting action and can have amazing opportunities to collect payouts. There are many different types of bets that are supported at betting sites and most punters will be familiar with moneyline and spread bets. These are the two most popular betting options for experienced punters, so they are options at just about every operating sportsbook.
Let’s say that the Mavericks and the Magic are playing in an upcoming game, and both teams are equal counterparts. Let’s say that the odds for that game are as follows. You will never see these odds, though, because in this example, the sportsbook is not set to make any money if they achieve their goal of getting money on both sides of the bet. But we need to look at it for you to better understand things.
Let’s say that people think the Mavericks are going to crush the Magic, and the money starts to pour in on the Mavs. Obviously, the sportsbook likes seeing a lot of bets come in, but they need them to come in evenly. So, to slow down the money coming in on the Mavericks and entice people to bet on the Magic, they will shift both lines. The new line might look something like this:

Betting “against the spread” (ATS) just means you’re betting on the point spread in a particular matchup as opposed to the moneyline, or some other type of wager. Bettors often use a team’s ATS record to gauge its performance against the spread. For example, the New England Patriots were 11-5 ATS in the 2017 regular season, meaning they covered the posted point spread 11 times, and failed to cover five times.