I think the most common and worst assumption a lot of bettors make that follow line movement is that all the sharp money is naturally going to be on the same side of a particular wager. If you picked 10 experienced, independent handicappers to assess the same 5 games, how many do you think would agree on the outcomes? or for that matter, on which game is the best bet?
From the books' perspective, their interest most of the time is in balancing the betting to maximize their hold on the games. However, when they have a strong lean on which way a game will go, and they see 70% of bets being placed on the wrong side, do you really think they'll adjust the line? Not likely. Does that 70-30 split imply that there's smart money on the 30% side? Not necessarily. Similarly, if there's a game that the book has no strong lean on, but the public loads up on the team that's had recent success and lots of media coverage to produce a 70-30 split, the book will most likely move the line to help balance the betting out. The line movement doesn't make the 30% side right. It's just a good business move on the part of the book...
Not every game line is being pushed around by smart money...
From the books' perspective, their interest most of the time is in balancing the betting to maximize their hold on the games. However, when they have a strong lean on which way a game will go, and they see 70% of bets being placed on the wrong side, do you really think they'll adjust the line? Not likely. Does that 70-30 split imply that there's smart money on the 30% side? Not necessarily. Similarly, if there's a game that the book has no strong lean on, but the public loads up on the team that's had recent success and lots of media coverage to produce a 70-30 split, the book will most likely move the line to help balance the betting out. The line movement doesn't make the 30% side right. It's just a good business move on the part of the book...
Not every game line is being pushed around by smart money...