This is another approach that may appeal.

Lets assume the general consensus of the public is more accurate than the majority of rating services.

If this is so , the Rated Price by a rating service should show an advantage in putting more on the horses showing Unders & less on the Overs.

RULES
Top Rated Horse must also be the race Fav.

Bet 1.3 units if live price is less than rated accessed price.

Bet 1.0 units if live price is more than rated accessed price.


Example.
Taree Mon 5th Dec.
Only 3 Top rated matched up to Live Market Fav

Rce....RtdtPrc...LivPrc ... Bet Units
1/2.... 2.40 .... 3.00 .....1.0
4/3 ... 3.80 ..... 2.60 ....1.3
8/3 ... 3.70 ..... 3.10 ....1.3 W

Ret 4.00
O/L 3.60
Prof +.40
11% POT
As opposed to approx breaking even at level stakes .

Of course, it only works if the process matches up to the theory about the general public consensus being more accurate than the majority of rating rating services , which I feel must be true because most rating services, generally, fail to deliver a yearly profit, when doing this exercise to Favs .
Therefore...
Betting more on the Unders and less on the Overs, should put it into profit.

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Cheers.