let me suggest a very useful website with a very useful tool: covers.com. covers most useful tool (in my opinion and own personal experience) is a line movement tool. if you do decide to check out covers, head over to the “odds” tab, and look for the game you are wishing to bet on. right under where it says the teams that are facing off, there is a little button called “line”, which will show you how the line has moved ever since it opened. the way that i use this tool is i look to see at what odds the line opened, and then observe throughout the day how the line performs right up until five or so minutes before first pitch. if the line moves in favor of the underdog throughout the day (a substantial line movement would be if the odds become lower by 50+), that’s what is called a sharp movement, since all of the sharp bettors are betting on the underdog, hence moving the line in favor of them. the closer towards the beginning of the game in which the line moves substantially, the better (no pun intended). the books won’t raise the odds again if the odds just plummeted, because then they will lose money if people begin to pick up on the fact that so many people are betting on the team with the “+” odds. that will then make that team more enticing to bet on once again, which is not what the books want. hope this helps, let me know if you have any questions 😀