stoney, I can't run this thru any data base for you but I'll give you my thoughts based on my research here.
stock standard rule, mainly 'coz they're unpredictable
- Must have finished 1st- 5th at their last start in a non sat metro race
Yup, that should add value, I like it, it's different. The strike rate will be low however.
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Must have a winning strike rate of 32% or more
This is a worry ..... why exactly 32%? sound slike backfitting to suit past results.
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Uni Tab rating of 91 or better
Not qualified to offer an opinion as I haven't studied ratings at all.
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Must have $11.00 of shorter in the betting last start
Fair enough, but it was in a non-metro based race, so it might not indicate too much, but again, it's different and will add value.
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Must $21.00 or shorter pre post for current race
The $21 is going to show a low strike rate. I think 80% ??? of winners are pre-post up to $11.00 ..... not too sure tho'
All in all, I like what you've put up 'coz it's different. I reckon the S/R would be really, really low and the DOWNER would be that if your system selects a horse with ability "the market" won't give you the price you need to go close to winning on level stakes. It's worthy of following and / or tweaking.
This advice is worth exactly what you paid for it ..... DYOR.