This would be the preference order generated by the Magic Numbers entries stored in your Enhanced Settings Module.
2 ~ 1-7-8-5- ...3-6-4
2 is your UDM horse.
~ is a separator character indicating a break to the next level down.
1-7-8-5 are the next n horses in your preference order.
- ... are separator characters indicating a break to the next level down.
3-6-4 are the final n horses in your preference order.
Suppose for the sake of argument:
You spent the requisite time doing research/record keeping needed to dial things in so that the preference order generated by the Magic Numbers entries stored in your Enhanced Settings Module represent potential +EV exotic wagers.