2. Sports betting systems refers to a set of events that when
combined for a particular game for a particular sport
represents a profitable betting scenario.
Since sports betting involves humans, there is no
deterministic edge to the house or the gambler. Systems
supposedly allow the gambler to have an edge.
3. Sportsbooks use systems in their analysis to set more accurate odds.
Therefore the novice gambler may believe that using a system will
always work, but it is the general consensus that at some point the
oddsmakers will have adjusted for the system to make it no longer
profitable.
Very short-lived systems are called trends. Any single event that
estimates a selection to have a higher likelihood of winning is called
an angle as they are meant to be used in conjunction with other
angles and trends to produce systems.