Technically, probability should always be a number between 0 and 1. It's often expressed as a percentage though, which makes things easier for the purposes of betting. 0.7059 converted into a percentage (i.e. multiplied by 100) gives us 70.59%. What this means is that the odds suggest the Celtics have a 70.59% chance of winning. If we believe the Celtics have an even greater chance of winning, then we should back them at odds of -240.
Unless otherwise stated all handicaps listed on DraftKings site are to be calculated based on the result from the start of the listed period to the end of the specified period. It is however customary that for certain handicap odds in specific sports (Asian Handicap in Soccer), only the outcomes obtained from the time of bet placement until the end of the listed timeframe will be taken into consideration, thus disregarding any points scored before the time the bet was placed and accepted. Any odds with these characteristics will be clearly displayed on site and highlighted in the user’s Bet History with the score at the time of bet placement.
"Draw No Bet" is where it is possible to bet on either the home team or the away team. It is also common practice to refer to "Draw No Bet" in cases where no draw odds are offered. Should the specific match contain no winner (e.g. match ends as a draw), or the particular occurrence not happen (e.g. First Goal, Draw No Bet and match ends 0-0) the stakes will be refunded.
Futures are wagers on long term events which generally won’t have a result for many weeks or even months. The most popular type of futureswager is placed on the outright market which basically means, who will win a league’s championship? FanDuel also offer many other markets outside of the championship, usually including divisional and conference wagering. The odds on futures change as the event gets closer and more is known about the teams. Very often odds will also be updated as the tournament or league progresses.

All of this is exactly the same for betting on Southhampton except you use the spreads and odds payouts that are underneath their team. You can also bet on the tie in a lot of sports, especially soccer. In the above example, the spread points would be added to Southhampton for calculations. This means that if you bet +3, you would need Southhampton to lose by exactly three goals.
Fantasy/Virtual Matches or Head to Heads are implicit matchups where the performances of two or more opponents which are not directly confronting each other in the same event are compared. Settlements will be based on the number of times each participant records a predefined occurrence (e.g. goals) in the respective match. The following criteria will be used to determine the settlement of these type of offerings:
A teaser is a bet that alters the spread in the gambler's favor by a predetermined margin – in American football the teaser margin is often six points. For example, if the line is 3.5 points and bettors want to place a teaser bet on the underdog, they take 9.5 points instead; a teaser bet on the favorite would mean that the gambler takes 2.5 points instead of having to give the 3.5. In return for the additional points, the payout if the gambler wins is less than even money, or the gambler must wager on more than one event and both events must win. In this way it is very similar to a parlay. At some establishments, the "reverse teaser" also exists, which alters the spread against the gambler, who gets paid at more than evens if the bet wins.

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.
Another form of futures betting involves the over/under on the number of games a particular team will win in the regular season. This type of wager is typically found on pro football and major league baseball, and sometimes on pro basketball. For example, the over/under on the Yankees may be 93 wins. If the Yankees go on to win 94 or more games, the "over" is a winner. If they win 92 or fewer games, the "under" is a winner. If they win exactly 93, the bet is a push and tickets are refunded.

It is a pretty simple concept once you get the hang of it, and you will also start to see profitable opportunities in football and hoops where wagering on the moneyline makes more sense than betting the point spread. If you really like an 8-point underdog in the NFL and think they will win, you can take the 8 points and hope they cover the spread. Or you can check out the moneyline option where they might be +280 and make more money betting them to win ($280) than on the point spread ($100).

Score three is usually the one that confuses people. Remember, when betting on point spreads, the favorite has to win by more than the number of points they are projected to win by. The underdog can lose the game, and you can still win your bet as long as they don't lose by more points than they are spotted. In the above example, if you were to bet on the Chargers at +3, you can imagine that like you have three bonus points to play with. You can lose by one point or by two points and still win the bet. If you bet the Chargers at +3 and lose by three points, it is a tie.
As you can see, the public seems to think that Florida is going to win this game by more than seven points. If the game started now, the sportsbook would stand to lose a lot of money if Florida did in fact win by more than seven points. They would stand to make a lot of money if Florida lost or won by less than seven points. Regardless of how the sportsbook thinks the game will go, they are not in the business of gambling. They want to guarantee profit as often as they can.
That was all before Charles McNeil, a math teacher from Chicago, invented the concept of the point spread. An avid gambler, McNeil created what he called “wholesaling odds” and started his own bookmaking operation in the 1940s. He started out offering this new style of betting on football, but his business model grew to include basketball.  McNeil changed the way sports betting was done, and his legacy lives on today in what we now call the point spread.