So let me get this straight, if you have a market with;
1/1
3/1
5/1
7/1
and you bet on horses 1+2 then you get a 0.75 overround and a 55+28 = 83% strike rate. Throw in horse 4 and now you have a 0.875 overround and an 85% strike rate which makes it unprofitable.
Ok.
1. Your...