**The bookmaker functions as a market maker for sports wagers, most of which have a binary outcome: a team either wins or loses. The bookmaker accepts both wagers, and maintains a spread (the vigorish) which will ensure a profit regardless of the outcome of the wager. The Federal Wire Act of 1961 was an attempt by the US government to prevent illegal bookmaking.[2] However, this Act does not apply to other types of online gambling.[3] The Supreme Court has not ruled on the meaning of the Federal Wire Act as it pertains to online gambling.**

**A quick word on that annoying half point in the point spread – most lines you’ll come across will use half points, but it’s not standard practice across the board. When you see a line with a full number instead of a number with a half point, your wager could end up as a push. In our example, if the line were 7 instead of 7.5 and the final difference in points was exactly 7, your wager is returned to you, and neither you nor the book makes money.**

`Wagering on the NFL revolves around the point spread in which one team is designated the favorite and the other team is called the underdog. The NFL point spread sets a specific number of points that the favorite must win by in order for a person betting that particular team to win their wager. Lets use an example from last week's NFL slate to demonstrate the art of NFL point spreads. This past weekend the New England Patriots played the Seattle Seahawks. The Patriots were four point favorites in that game. So in your local newspaper, you might have seen something similar to this illustration.`

**The team that has the minus sign, which is the favorite, has points deducted from its final score, while the dog, with the plus sign, has points added. The favorite must beat the spread, which means they have to win by more than the negative number to pay off. The underdog pays off in two instances—if they win outright or if they lose by less than the spread.**

*So the sportsbooks and bookies created a point spread to make both teams equally attractive in the eyes of bettors. Carolina was installed as a 6-point favorite, which is commonly written as Carolina -6. Denver, the underdog, is commonly written as Denver +6. In other words, Denver would be credited with whatever points they actually scored — plus six. If you bet the favorite, the Panthers would have to win by 7 points or more for you to win your wager. And remember, the Panthers are favored by 6 points, so we have to subtract 6 points from their final score for betting purposes.*

### A point spread - Lets take, for a hypothetical situation on one of the types of football bets (using the point spread), that the Kansas City Chiefs were visiting the Detroit Lions and Detroit was established as a six-point favorite at game time, which is commonly written as Detroit -6. Kansas City would be the underdog and displayed as Kansas City +6. If you bet the favorite, Detroit has to win by more than six points to win your bet. Remember, the Lions are favored by six points, so we subtract six points from their final score on a spread bet. If Detroit were to win 27-20, Lions bettors would win their wager. If the Chiefs were to win the game by any score and you picked the Chiefs you would win not including the extra six points. If the Lions were to win, 20-14, it would be exactly six and a push, so you would get your money back.

`If you follow football at least reasonably closely, have some idea about the relative strengths of all the players and teams, and have absorbed the information provided on this page, then you should be able to become a competent football bettor. You don't really need to know much else should the aim be to simply have some fun and win some money every now and then.`

`To understand what the "limit" means in sports betting, you need to think about the limit we follow every day in our life - the speed limit. Speed limits are set in place to ensure the safety of everyone driving on the road. If everyone does the same speed, the less likely it is for a crash to occur. If you go above the limit, you are putting others in danger, not only on the road in cars, but pedestrians as well. They are in place for a reason, which is to control the way people act. The same can be said with the limits set by a sportsbook. They are in place to reduce any potential damage the books may suffer and keep bettors under their control. Read More >>`

*Many of the leading gambling bookmakers from the 1930s to the 1960s got their start during the prohibition era of the 1920s. They were often descendants of the influx of immigrants coming into the USA at this time. Although the common stereotype is that these bookies were of Italian descent, many leading bookies were of eastern European ancestry.[4]*

**The simplest way to think about a moneyline is to consider a base bet of $100. A moneyline is a number larger than 100, and it is either positive or negative. A line with a positive number means that the team is the underdog. If the line, for example, was +160 then you would make a profit of $160 if you were to bet $100. Obviously, then, the team is a bigger underdog the bigger the number is - a +260 team is perceived to be less likely to win than a +160 team.**

As you can see, there’s another number in our example above. The –110 in parentheses refers to the juice; this figure is expressed in the same fashion as moneyline odds, with either a negative or positive sign in front of the number. In this case, in order to place a wager on either side, you would have bet $110 to win $100. If the juice on Kansas City had been +110, you would have bet $100 to win $110. Most NFL game lines ask you to pay the standard –110 vigorish. If you don’t see any particular figure attached to the spread, the usual –110 vig applies.

When you see a moneyline value associated with the point spread, it is the percentage amount you must pay in order to book the bet. Also known as the juice or vig, if you see -11.5 (-115), it means you have to bet $115 to win $100 — a 15 percent commission for the sportsbook. The underdog may see a value such as +11.5 (+105), which means you’ll have to bet $100 to win $105 if your team successfully covers the spread.

Spread betting are wagers that are made against the spread. The spread, or line, is a number assigned by the bookmakers which handicaps one team and favors another when two teams play each other and one is perceived as being more likely to win. The favorite "takes" points from the final score and the underdog "gives" points. This number can also be in increments of half-a-point (.5) even though very few sports have .5 point scoring (i.e., The Ryder Cup)

*The key here is to target the point spread five and seven, because these are virtually tied as the most common margins of victory. It's important to recognize that most betting sites are only willing to sell 2 or 3 half points for 10 cents each, after which point they start charging more. Some sites sell up to four half points at this price though.*

^{In most cases, the favorite will be the team with a negative moneyline (in some cases both teams can have a negative moneyline if they are both closely matched). A line of -160 means that you would have to bet $160 to win your base amount of $100. A team with a moneyline of -130 wouldn't be favored nearly as strongly as a team with a moneyline of -330. }

*A lot of bookmakers offer telephone betting services, and they are usually very straightforward to use. It's a simple matter of calling the relevant number, telling the operator you reach which wagers you want to place, confirming the odds, and then providing your credit card details. Some bookmakers take other payment methods too, and some even offer credit lines to select customers.*

*Here you can see that the Rams are +3.5, while the Cowboys are -3.5. So for this example the Cowboys are 3.5 point favorites, while the Rams are underdogs of 3.5 points. If you were to bet on St Louis you would need them to lose by 3 or fewer points or just win the game outright. If you were to bet on Dallas you would need the Cowboys to win by 4 or more points.*

__The NFL spread (betting point spreads is also known as betting ‘sides’ since you are picking one side to win the game) acknowledges that not all teams are created equal. If they were, we wouldn’t need NFL point spreads at all – teams would be so evenly matched that every game was a toss-up (or a pick em in football parlance). Simply picking the winner would be enough of a challenge.__