If you see the point spread move, let’s say from -9 on Tuesday to -10.5 on Friday, this is known as a line move. It occurs when there is a surplus of bettors wagering on the same side of the game and sportsbooks move the line to balance the action. That means encouraging more people to bet the other way by making the line more appealing. This reduces risk for the sportsbook, who wants to have an equal handle on each team.
The wager is that the two teams will combine to score more or less than 43 points. If the total score is 43, then the wager is a push and you get your money back. It doesn’t matter which team scores the points. It could be 24-20 for either teams and “Over” wins the wager. Likewise, the final score could be Jets 45-0 (Yeah!) and the “Over” wins. On the flip side, the score can be 21-20 and the “Under” wins. Likewise, the Jets could win 42-0 (Yeah!) and the “Under” also wins.
Absolutely. When the lines go up for the NFL, or for the first game of the NCAA men’s basketball tournament, there are several days in between the open and the game itself where movement can take place. You’ll find that the betting public tends to pile in on their favorite teams once they get home from work on Friday. You can anticipate these line movements and time your bet accordingly to take advantage.
Teasers are similar to parlays except the point spread on each game moves a certain number of points in the player's favor. In football the player gets 6 to 7 points, and in basketball, 4 to 5 points. The player pays for this in the form of much lower winnings. For example, if the Vikings were part of a 6-point teaser, then they would only need to win by more than 4 points to cover. If the Rams were part of a teaser, they could win, or lose by less than 16, and cover.
What's the difference between an oddsmaker and a bookie? A bookie's job is purely mechanical. He gets the line from Vegas or another source, offers bets at those odds, then collects money from the losers, pays out to the winners and keeps the vig. Oddsmakers don't actually take bets -- they study the games and set the lines. Bookies often adjust the spreads for their games, so they do a little oddsmaking, and oddsmakers work for casinos, which operate sports books that take bets.
If you're seeing 15 or 25 instead of 15/1 or 25/1, you're seeing a decimal form of odds, as opposed to fractional. Multiplying your stake by decimal odds gives your total return, not your profit(which is total return -stake). To get to fractional from decimal, add 1. So 3/1 fractional = 4 decimal (just 4). 4/6 frac = (4/6+1) dec = 10/6 = 5/3, or 1.666, which is rounded to 1.67 by bookies. To go from decimal to fractional, subtract 1(which makes sense from profit = total return - stake) So 15 dec = 14/1 frac. 2.33... dec = 1.33/1, or 133/100.
Point Spread – This is the margin of victory for a game determined by the oddsmaker. Sportsbooks use this to create action on both teams. The favorite will have to win by more than the margin the oddsmakers set. If the Broncos are favored by 2.5 against the 49ers, they must win by 3 points or more for a win. If they only win by 2, they didn’t cover the spread and those who bet the 49ers will win.
Using an online sports betting site is far and away the best way to bet on football, or any sport for that matter. It's the most convenient and accessible option, and there are several other advantages too. Best of all, it's legal in the United States. There are some laws against online gambling in the US, but these mostly apply to companies and individuals providing gambling services. There's no law that states it's illegal to use a gambling site of any kind, so Americans are at liberty to place football bets online if they so choose. We've written the following page explaining things in more detail for those interested, or you can just keep reading for a quick guide to getting started online.