As you can see, each team is listed, followed by the adjustment or line change for each team, and then the odds that you would be paid out. If you notice, Chelsea has the word scratch next to their name. This is because they are the league favorite to win and all other adjustments are made about them. If your team is in first place at the end of the regular season after the adjustments are made, you will win your bet and be paid the posted odds. As you can see, the odds pay out fairly well on these bets as they are season long and are more difficult to win.
What may look like a jumble of words, numbers, and punctuation is actually a precise and easy-to-read breakdown of the various odds and point spread details your book is offering. Here is a breakdown of each unit of information given above. Once you understand each part of the jumbled details above, you’ll be able to read a sports betting line with confidence.

What this means is that in each contest, there is going to be a favorite and an underdog. It’s important to point out that when you look at a moneyline bet, and you see that a team is a favorite or an underdog, this is only in relation to the money that is being bet. While these numbers will usually be in line with which team is the actual favorite and underdog, it could be different. Remember, the betting lines are tweaked so that the sportsbook can get the right amount bet on each side of the contest.

At a site that offers a free play bonus, you'd bet $100 free play on the Grizzlies at +210. At another site, where you have a cash balance, you bet $150 cash on the Celtics at -240. If the Grizzlies won, you'd win $210 cash from your free play but lose your $150 cash. That's a profit of $60. If the Celtics won, you'd win $62.51 from your cash bet and lose only your free play credit. That's a profit of $62.51

You may be wondering how we determined which of the two teams was the favorite and which was the underdog. You may also be wondering how much you get paid out for a bet on either side of this game. If you look at the odds above (this is a screenshot from an actual online sportsbook), you’ll see that all of that information is given to you. Before the spread number of 4 ½, you’ll see a plus or minus sign. The plus sign indicates the underdog and the minus sign indicates the favorite.

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. 

You’ll see on the right-hand side of the teams a number with an “o” or a “u” before it. As you may have already gathered, the “o” stands for over and the “u” stands for under. Even though the over is on the Celtics line and the “u” is on the Mavericks line, it does not matter. They’re written that way for organizational sake and not because either bet is connected to either team. Remember, it only matters that the total score of the game is. One team can score all of the points, and you’ll still win your bet.
If the public comes out and bets really hard on one side, the line is going to move a lot making the odds worse on that side and a lot better on the other side. If you’re planning to bet against the public, you should wait to bet until the line moves as far as you think it is going to. Be careful, though, if you wait too long and some big money bettors bet, they can move the line back.
Had you initially bet $100 on the Mavericks, you would walk away with a profit of $90.91. Now, if you bet on the Mavericks, you will see a profit of only $76.92. On the other side of the bet, an earlier bet on the Magic would have paid you $105. Now that same $100 bet will get you $125 if the Magic win the game. Ideally, this will entice more people to bet on the Magic and the action on the Mavericks to slow down.

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.
Earlier, we explained how the implied probability of -240 is 70.59% and how the implied probability of +210 is 32.36%. Notice these two probabilities total 102.95%. The extra 2.95% is the bookmaker's advantage. It's called vig, and it's basically a commission that they charge customers for placing wagers. By removing the vig, you can see what the fair odds on the game would be.
First, however, a word of caution: Sports betting can be a fun and profitable venture. However, like most good things in life there are pitfalls to be aware of. You should be able to enjoy many positive experiences as long as you bet in moderation and under control. We know you have heard this before but it definitely bears repeating: don’t bet money you can’t afford to lose, either emotionally or financially. If you or someone you know shows signs of compulsive gambling, one place to find help is Gamblers Anonymous.
If bettors were quick to jump on the Atlanta line at +4.5 when it first came out, they would have a distinct advantage over those who waited closer to kick off and were stuck with +2.5. The opposite holds true for Carolina. Bettors that were quick to pull the trigger are now laying two more points than they would if they were patient and saw the line movement before making their move.
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:
If bettors were quick to jump on the Atlanta line at +4.5 when it first came out, they would have a distinct advantage over those who waited closer to kick off and were stuck with +2.5. The opposite holds true for Carolina. Bettors that were quick to pull the trigger are now laying two more points than they would if they were patient and saw the line movement before making their move.

According to an article in The Times dated 10 April 2009, approximately 30,000 spread bet accounts were opened in the previous year, and that the largest study of gambling in the UK on behalf of the Gambling Commission found that serious problems developed in almost 15% of spread betters compared to 1% of other gambling.[7] A report from Cass Business School found that only 1 in 5 gamblers ends up a winner.[8] As noted in the report, this corresponds to the same ratio of successful gamblers in regular trading.[9] Evidence from spread betting firms themselves actually put this closer to being 1 in 10 traders as being profitable, with a high number of clients suffering from the volatility that is supposed to be one of the benefits of spread betting.[citation needed]
In the brackets after the last two games, you will see the odds associated with each of the bets. Let's say we made our earlier example bet of the Chargers -3 and the final score of the game was Chargers 21, Cowboys 14. Looking at this, we already know that we won our bet, but just how much money are we going to get paid? For this bet, we will get paid even money because that is what is posted in the parenthesis. This means that if we bet $100, we will profit $100 for winning our bet.
Above, you can see several numbers to the right of both teams. These all represent the different lines that are available on the San Francisco vs. Los Angeles game. The first set of numbers for both teams is the point spread, the second set is the moneyline, and the third set is the over/under (a.k.a. totals). We'll explain each of these lines more in-depth below.
The term moneyline is actually somewhat misused in sports betting as it really just means a type of odds format. Technically, it is a way to represent the odds/payouts for a win bet, but we’re not going to split hairs. What we’d like to point out is that the odds on each participant in a sporting contest can be listed in one of three different formats.

As you might guess, you’re mainly going to see American odds in American sportsbooks. The other two formats are much more prominent in Europe and Asia. If you’re betting online, most sportsbooks give you the ability to change all of the odds on the site into the format that you prefer. No format is different regarding payouts; it’s just a different way of presenting the information.
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:
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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.