Basic Math.
You should always buy the hook if you can lay NO MORE THAN -120. That's tough to find in the NFL as most books are -125 to -130.
Remember, it's not about today plays it's about beating the vig in the long haul. You will be a winner at -120 and a loser at -125 buying1/2 points on or off of the hot numbers.
Only buy number to get to the "hot number"
Football Hot Numbers - 3,4,6,7,10,13,14,17,20,21,24,28.
Lucky21