Interesting stats :

Last start winners make up 8.90% of runners.
They win 13.93% of races.

Those that finished 2nd last start make up 8.72% of runners
They win 13.97% of races.

Those that finished 3rd last start make up 8.34% of runners
They win 10.77% of races.

Resuming horses make up 11.37% of runners.
They win 9.91% of races.

Interesting stats if you think about it ....

For instance just restricting yourself to last start winners and those that ran 2nd or 3rd last start you are only going to be looking at 26% of runners ( in a field of 8 this is only 2 runners) and you will be looking at a base set that produces 38.67% winners (almost 40% of races).

Good Luck.