Chrome, here's another $1.50 limit you might be interested in. The rules are:

1 ) Neural CF and PR categories at a setting of 3, all others at 0.
2 ) Maximum price of $1.50.
3 ) Won last start or ran second.

Unfortunately I can't get into the neural site at the moment. It went offline (for me anyway) about 30 minutes ago. But I was able to check Sunday's racing and part of Saturday's.

The results so far are promising.

There have been a total of 10 selections for 9 placings with a return (Unitab) of $14.10. There were 3 winners for a return of $8.80.

Of these, there were three selections that won last start for 3 placings with a return of $5.40 and 2 winners with a return $7.10.

Interestingly, there were 7 horses at a maximum rated price of $1.50 that did not win or ran second at last start - all 7 horses were beaten, but one of them started at double figures.

When I can get into the neural site I will investigate further.