Here goes, little bit of work but might be worth tracking it for a while -

1. Non maiden races only
2. Odds $1.0 to $20.0 & bet to liability but exclude all favourites
3. 1000-2100m
4. 2-5 yold
5. Starts rank >=2
6. Days rank 1 to 6 & <84 days since last start
7. No Sundays