Automated Dutching - Avoiding The Outsiders

[novicestakes]

Hi all - Ive been working on automated dutching. and so far, my win rate is 85-95% as Im covering a good percentage of horses (going for smaller wins, less risk)

However, my plan falls flat when a horse with no bets on comes steaming through and wins - resulting in a big loss. Typically a rank outsider - saw this about 5 times over the weekend in practice mode.

Does anyone have any ideas on how to combat these issues? My guess would be to look for selections with no matched bets at odds less than others in the field(?)

Would welcome your feedback on what could be done or ideas on how to look at this.