Heres a plan that has a logical twist that has not been pursued very much.

We concentrate on the top 4 horses in either Pre-Post market ,ratings subscription, top 4 place ranking or average prz money ranking,etc.
I feel the subsription services would produce more larger priced winners as opposed to the pre-post market.

The top 4 in the pre-post market has a 70%SR

RULES
We back the 2 horses with best barrier advantage between its last start & todays barrier draw after scratings.

E.G. If last start was barrier 13 & todays barrier is 3 ,we have a +10 point advantage If last start barrier was 1 & todays barrier is 11,we have now a -10 point disadvantage.

Sometimes there will 3 selections because of a draw in points, so its an idea to back all 3.

You will see it works very well if your 4 selection process has a strong SR.& try & target races with a fav paying $3.10+
Plus target races where the whole field has had 2 or more starts.

It would be interesting to see other peoples findings.

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Cheers.