Definition: Using past game results to predict future results. The assumption is that specific situations that have historically delivered winning results will deliver winning results in the future when the situation arises again. Specifically, an Angle is a more narrow subset of a System.

 

Example: A certain System says to bet against NCAA basketball tournament teams who have covered two straight ATS (Against the Spread bets). The subset Angle says the results are even better if the team is favored by 10 or more points.