While this method often doesn’t hit the mark, when it does, the reward is big and the potential loss is only minimal.
The overlap arbitrage focuses on markets such as the Under/Over points in sports such as Rugby League, Union, AFL and Basketball or Under/Over games in tennis.
The line margin is another market which is worth honing in on. Bookmakers will have wide ranging opinions on where an under/over line should sit.
Take an NRL game. One bookmaker may set their under/over line at 37.5 points.
Another bookmaker sets their under/over line at 34.5 points. This gives opportunists a three point range which they can potentially capitalise on.
The way they do this is by backing both the under 37.5 point result and the over 34.5 point result.
Have $100.00 on both results at the standard price of $1.90.
It will cost $200.00 however you are guaranteed to reclaim $190 of it regardless of the result.
The upside of the strategy is if the total score lands between 35 and 37 points, both wagers will win. A punter successful here will win $380.00 for what is effectively a meagre $10.00 outlay.
The bigger the gap, the higher your chance is of both wagers landing in the sweet spot.
