You will also ought to analyze the strengths and weakness of the teams and its players and also the statistics in the games.
Sources

1) Bloomberg: New York City Off-Track Betting To Shut Down This Week Without Rescue(2) The Huffington Post: New York City OTB Finishes Dead Last. Over the long term, that is certainly, excluding a lucky draw against yourself any given day, the good card player will take money consistently from the poorer card player.