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.
The last number in the top two rows of our sports line example is known as the money line. If you’re not interested in betting on the point spread, you can wager on a team to win outright. The plus sign next to the underdog (in our case, the Giants) indicates how much money you’ll earn for every \$100 you bet on the money line. Conversely, the minus sign next to the favorite’s line tells you how much you have to wager in order to win \$100. In our example, a \$100 wager on the Giants earns you \$300 should they pull off the upset, while a bet of \$405 on the Cowboys will net you an extra \$100. Representing odds in units of \$100 makes placing different size bets easy; if you want to bet \$10 on the Giants, you stand to earn \$30 if they win, while a \$40.50 bet on the Cowboys will net you an additional \$10.
I will painlessly explain all of the mysteries of sports betting 101 aka “Sports Betting for Dummies.” First of all, you have nothing to be ashamed of, you have taken the first and most important step of all – learning! Why waste money on a game that you don’t fully understand? You shouldn’t! That is why you are here now, to learn how it works and how to win!
Each week we see the volatility in the pro football point spread market with opening spreads often but not always moving and closing at a different number. In general the movements are caused by the weight of money on one side or the other however injury rumors or confirmation of an injury to a key player, unrest in a particular NFL team's management or any number of other reasons can contribute to a point spread line being reassessed and changed by the sportsbooks. The question is often asked then, is it better to place your NFL point spread wager early on the opening lines or wait until the hour or two before kick off? There are certainly pros and cons for both which are discussed further in The Football Lines .com's When to Place Your NFL Bet article however ultimately there isn't a definitive right or wrong answer as varying NFL betting situations can require a different and flexible approach.
The money came in heavily on the Patriots for the 11 days following the conference championship games. Over the weekend, we started to see money come in on the Rams, but it was mostly on the moneyline. The Patriots are closing as -127 or -137 favorites at most sportsbooks (bet \$127 or \$137 to win \$100), with Bovada going up to -140. Las Vegas online sportsbooks are setting at -135, although MGM Mirage is up at -145. The Rams are between +115 and +120 underdogs (bet \$100 to win \$115 or \$120), although again at MGM Mirage, you can get them higher at +125.
Futures – wagers made in predicting an event in the future like next year's pro pigskin title. Oddsmakers produce lines during the year, depending on the strength or weakness of teams, then offer wagers on each team to win. For example, a league's top team may be +150 to win the championship. That means a \$100 wager would pay \$150 profit. However, a poor team might be +3000, indicating they are not expected to win and a \$100 would pay \$3,000 as a huge longshot.
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)
The point spread is the projected number of points that separate two teams.  A game with a spread will have a favorite (the team expected to win) and an underdog (the team expected to lose).  A favorite “gives” points and is identified with a minus sign next to their point spread.  The underdog “gets” points and is identified with a plus sign next to their point spread.
As always, beware of sites offering paid or free NFL betting picks in connection with a varying unit betting system. If you are using their pro football betting picks to gamble on NFL football games, you might consider that some of these sites are providing money tips which are likely to drain your NFL sportsbook account. Earning gambling profits long term takes discipline to know there is always another game to bet on. Most free sports pick sites don't understand that it requires more than winning football predictions to earn a living betting on sports. So for anyone living in an area where NFL gambling is legal, keep in mind that relying on "bet the house" free NFL picks could seriously reduce your NFL betting success.