To achieve this balance, the book can move the spread and/or the juice at any time after the first lines hit the NFL odds board, all the way up until kick-off. If there had been too much action on the Packers at Super Bowl 1, the oddsmakers could have made Kansas City a 15-point underdog (+15), in order to encourage more people to bet on the Chiefs. They also could have kept the spread at 14 points and moved the juice, perhaps to –105 for Kansas City and -115 for Green Bay. You’ll often see the books adjust the juice first when the spread is three points; since so many NFL games end in a winning margin of three points (roughly one in six games), moving the spread from 3 to 3.5 points is a pretty big deal, and it might tilt the balance too far in the other direction.
Money Line: More common in baseball and hockey, pro football moneylines are growing in popularity. There is no spread, so your team just needs to win the game, not win by a certain number of points. The negative value means a favorite (-190) and a positive one indicates an underdog (+170). Picture the number 100 sitting in between these two values. Example: if you want to pick a -190 favorite, you must risk $190 in order to win $100. To back a +170 underdog, you put up $100 and win $170 if the dog wins. In some cases, betting moneylines is actually better value and can provide a bigger profit for less risk.