This is a very common occurrence in sports betting and sportsbooks have the full right to shift the spread or odds for any given match prior to it starting. Many factors can influence a change of the spread such as injuries, the number of bets coming in for either team or the weather, to name a few. Depending on the timing of placing the bet, the bettor can also have an advantage or a disadvantage depending on which way the spread has shifted.
As you can see above, the combined score for Superbowl XLV was 56, and since this line was offered at reduced juice, a wager on the over at 44.5 of only $105 would yield a profit of $100. This line closed at a high of 46 points at some books, demonstrating how the public, who tend to show a proclivity for high scoring games, can increase an O/U line.

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.
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.
A lot of betting strategy is very complex, and it definitely helps to learn some of the more advanced concepts if you want to be truly successful. However, trying to get your head around complicated strategies is NOT the right approach as a beginner. There are several simple betting systems that are relatively easy to understand, and it makes much more sense to start with these. They're not guaranteed to bring immediate success, but they can be effective if used correctly.
The first number in the listing pertains to the order this game appears on a sportsbook’s board. The next NFL game would be listed as #103 for the road team and #104 for the home team. You can think of these numbers in the same way that each horse in a race has its own betting number. The next big takeaway from this listing is that the top team is always the road team (thus the odd number) and the bottom team is playing at home.
Generally, the number next to the spread is “-110”. This is what’s known as the juice, vig or odds. The juice is a fraction of the wager taken from the bettor if the bet wins. In this instance, a winning wager of $110 will yield a profit of $100.The example above demonstrates that, although Indianapolis won the contest, Tennessee covered the spread by losing by less than nine points. An important aspect of sports betting is capturing the best line possible. A great way to achieve this is by shopping for the best line.
While home field advantage may be a sports term, it can also be linked to your house, your route to work, or even a trip to a familiar grocery store. Think about this for a second. If you've ever hosted a party at your house, you know where everything is and you would have free reign to go into any cupboard, drawer or room you that you please. That would be an example of home-house advantage. If you've ever gone to an unfamiliar grocery store (maybe you weren't around town but you needed to make a pit stop), it is going to take you a while to find exactly what it is you are looking for. Read More >>

Now that you have the basics down, there is only one thing left to discuss – where to bet that is safe. I strongly recommend that you start by wagering on only one pick per day. You don’t want to spread yourself too thin and have your hand in every match available. If you bet that way, you will surely get nickel and dimed out of your bankroll. Spend time studying the teams and choose your best selection available. Decide on a budget of how much you are willing to risk. Now you need a reputable online sportsbook (online sports betting site) to do business.
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:
If you place NFL bets or gamble in a football pool, see if your NFL wagering success increases with a bet on's NFL expert picks & predictions... While the full card of week to week NFL game picks aren't 100% free NFL picks, we think you'll see by our subscription options that you're practically getting our NFL selections on the house.