Most Sports Books Deduct The First Half Score From The Over Line . This Had Been Profitable For Me Like For Instance Ucla Game 23-41 ,,,64 Points Scored The First Half I Bet The Under Second Half 74 1/2 This Line Is Usually Posted After The First Half So Not Much Time To Get In, Also Most The Time Lines Ar Not Changed For Instance If A Team Is Leading By Twenty Points At The Half And They +10 They Will Be + 5 For The Second Half Normally You Woud Take The Team - 5 There But If The Favorite Was Winning By Twenty At The Half -5 Is A Bargain Anyways This Is One Way To Crush The Line Good Luck