If the Cowboys are 6-point favorites, their odds are -6. If the Giants are 6-point underdogs, their odds are +6. From the oddsmakers' perspective, the Giants are starting the game with a 6-0 lead, while from the Dallas side, the Cowboys are starting with a 0-6 deficit. If you bet on the Cowboys and they win 34-30, they failed to cover the spread by two points. If you bet on the Giants, they beat the spread by two points.
If you've never set foot in an actual sportsbook before or logged into an online sportsbook, the chances of you getting overwhelmed when you actually do is very high. In an actual Las Vegas sportsbook, there is typically a lot of commotion and the odds and lines are displayed on a massive digital board for everyone to see. When a novice sports bettor looks at the massive digital signage, they will see a bunch of numbers, both positive and negative, some two digits, some three digits. They also won't have a clue what any of it means. The same can be said for the online sportsbooks. It looks like a massive spreadsheet with negative and positive numbers beside each teams' name.
If the Cowboys are 6-point favorites, their odds are -6. If the Giants are 6-point underdogs, their odds are +6. From the oddsmakers' perspective, the Giants are starting the game with a 6-0 lead, while from the Dallas side, the Cowboys are starting with a 0-6 deficit. If you bet on the Cowboys and they win 34-30, they failed to cover the spread by two points. If you bet on the Giants, they beat the spread by two points.
For beginning sports gamblers, moneylines (sometimes called money lines or American odds) can be confusing. Unlike point spreads, which are concerned with who wins and by how much, a moneyline is solely dependent upon who wins. Moneylines are used most commonly in low-scoring games like baseball or hockey, but they may also be used in boxing and other sports.

Let’s start with the basics: what do sports bettors mean when they talk about a ‘line?’ The word line, in the language of a sportsbook, can refer to either the odds and/or a point spread in any sports contest. Let’s take a look at an imaginary line the way you’d read it off the board sitting in a Vegas sports betting lounge or on the screen at your online book. Let’s imagine a game between the New York Giants and the Dallas Cowboys. Your book’s NFL betting line might look something like this:

When the point spread was invented in Chicago by Charles McNeil the money line took a backseat. When two unevenly matched teams played, the playing field was leveled by having the favorite give points (for example Chicago Bears –7) while the underdog got points (Minnesota Vikings +7). No matter which team the bettor took the bettor would always risk \$110 to win \$100. The extra \$10 needed to win \$100 is called the juice or the vig, it is basically the house’s or the bookie’s take. It’s 10-percent of the bet so it would take \$33 to return \$30 and \$440 to return \$400 etc. (winning bettors get the vig back).
Many casinos around the world contain a sportsbook. They usually feature several big screen TVs showing any live sports action currently taking place, and computerized odds boards displaying all the latest odds. There are typically cashier windows where you can place your wagers with a real person, but some books have interactive machines instead. Either way, these are great places to place some bets and watch the games at the same time. The problem for Americans, though, is that they are only legal in Nevada. There are plenty of sportsbooks in Las Vegas casinos, but not in other parts of the country.

In football the money line is often a popular choice for bettors who have been burned by last-second scoring that actually had no actual affect on the outcome of the game. With the money line you just have to hope your team wins rather than cover a point spread. Of course, the one downside is having to risk more money to return the same amount that a point spread bet would net you.
Several factors influence a point spread. It starts with power rankings. The media creates power rankings throughout the year, but those can be entirely subjective based more on feelings and emotions than actual raw data. An oddsmaker creates power rankings based on a host of statistics, some more complex than others. The rankings will include record, strength of schedule, and various offensive, defensive, and special teams metrics. They might use Football Outsiders’ efficiency metrics, they might use expected points added, or they might use a host of other internal and external options. The idea being to develop as objective an assessment as possible as to how good or bad a given team is compared to the rest of the NFL.
In my honest opinion, tennis is a sport that doesn't get nearly enough credit for being a legitimate source of entertainment as a fan and a legitimately hard game to master. Since you are reading this and have access to the Internet, I'm sure you've heard of Roger Federer and Rafael Nadal. They are the two biggest names in the sport, even as their careers are starting to wind down. The debate between both sets of fans as to who the "G.O.A.T" is rivals that of the LeBron/Kobe or Ronaldo/Messi comparison. Read More >>
The positions of the four major American sports leagues (representing American football, baseball, basketball, and ice hockey) have become more complex since their decision to embrace daily fantasy sports (DFS) in 2014, which are described by those within the industry as "almost identical to a casino" in nature. With the contention by critics that such activities blur the lines between gambling and fantasy sports, the endorsement of all four major sports leagues and many individual franchises provided a marked contrast to their positions on betting.[43]
For example, in NFL wagering you’ll have a pool of 12-14 quarterbacks, running backs, etc. and you can choose who will have the most fantasy points, 2nd most fantasy points, 3rd most fantasy points. Each player starts the week with certain odds that change as money wagered on different players. Your payout is based on the closing odds like parimutuel horse wagering.
Some people refer to sportsbooks as a sanctuary; a place they can go where they do their best thinking and enjoy the games and atmosphere. Some people refer to them as utter chaos and other than placing their bets at one, do everything in their power to get out before the games actually start. Whether you are one side of the fence, or the other, as long as the sportsbooks have your money tied up with them, they have you right where they want you. Sportsbooks are here to stay, so I suggest getting used to all the chaos. Read More >>
The first thing you’ll notice with moneyline odds is that there is either a positive or negative sign in front of the number. What that sign denotes is how much you’ll win betting on each side. If there’s a positive sign next to the odds, that indicates the amount of money you would win if you bet \$100. If the odds on a tennis player said +150, that means that for a \$100 bet, you would win \$150. Now if there is a minus sign in front of the odds, that is the number that you would have to bet in order to win \$100. For example, if a football team was -250, that means you’d have to bet \$250 to win \$100.
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.
In this example the Jets are listed as four-point favorites (-4) over the Bills and the 49ers are three-point underdogs (+3) against the Seahawks. So, if you bet \$110 on the favored Jets, they must defeat the Bills by more than four points in order to win \$100. If you bet \$110 on the underdog 49ers you will win \$100 if they win outright or lose by less than the three-point spread. If the final score happens to end up exactly on the number it's a tie, or 'push,' and you get your money back.
Oftentimes a point spread will not be a whole number, and will be accompanied by a decimal point and a half number. This can be significant for a point spread. Essentially what it comes down to is that a whole number point spread gives the opportunity for a wager to push. A push means that if the favorite is favored by 10 points and wins by 10 points, bettors get their money back. Just like when betting on the over/under total for points, the spread is a half-point in addition to the whole number, there is no chance to push.
Once the Southeastern Conference gets going on Labor Day weekend, people can bet on the outcome of each game. Or they can make proposition bets on who wins the coin toss, which team will score first and whether the first points will come from a touchdown or a field goal. With proposition bets, fans don’t have to wait until the end of the game to win or lose.
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The 3-digit numbers to the far right are the listed prices for these bets.  This is also called the odds, vig, or juice.  An easy way to think of it is the amount you must risk to win \$100 on this wager.  In our example, -110 means you must risk \$110 if you want to win \$100.  -110 is pretty standard, but you will find different options.  We will cover those in more depth when we talk about money lines.  The price of the bet has no impact on which team is favored.  Only the plus or minus on the point spread matters.  This is handled differently when you bet strictly on the moneyline.
However, there are some good values with teaser bets if you know how and where to find them. For instance, the six-point teaser is an especially effective bet in the NFL, where most games are tightly contested and six points can make a world of difference. For instance, in our previous example, the Bears would go from laying six points to simply needing to win if you put them on a teaser bet. Conversely, Detroit backers could get 12 points instead of the starting six. (Source: Doc's Sports Service)
You can also bet straight winners and losers -- with no point spreads involved -- with money line wagers. When there is a minus number you bet that amount to win \$100 in profit. When there is a plus number, that is your winning profit for every \$100 wagered. So if the Cowboys have a money line of -250, you would have to bet \$250 on them to win \$100 in profit on any Dallas victory. If the Giants had a money line of +150, you would win \$150 in profit with a winning \$100 bet. If a money line is posted as even, you would win a \$100 profit on a \$100 winning bet.
The process of sports betting is nowadays better regulated and therefore a lot safer. The perception in society is also getting better and better. There are several reasons for this. On the one hand, the legalisation of online sports betting made it clear that this industry is no longer run by criminal gangs. In addition, many people recognized the irony that although they liked to play the lottery or participate in other lotteries, they still considered sports betting too risky, although they have the better chances of winning. The market was free and better controlled, the state lost its monopoly on gambling and betting providers could advertise for themselves. Now that the bookmakers were represented on television or on posters by prominent faces, the perception changed even faster. The opportunity to now also place sports bets via the Internet drew the attention of many people interested in sports. You no longer had to go to a betting office, but could place bets from the comfort of your own home, on the bus, outside with friends or in a pub.
Total: Also called the over/under, it is a number set by the sportsbooks that proposes a number of points that will be scored in the game by both teams combined. Then, fans predict whether there will be more points or less points than the Â‘total.Â’ If you bet the under 41.5, you are hoping for a tough defensive battle with lots of running game. Pick the over, and presumably you feel this will be a high-scoring game. In short, you are predicting whether the combined total score will be more than (over) or less than (under) the total.