Here's a simple plan that's showing strong POT

RULES
Target races with 6 runners exactly.

Must be live market 3rd fav.

Bet 1/75th of bank.
Level stakes.

RESULT
19%SR
23% POT

There were 442 selections for the System
There were 430 races for the System
There were 86 Winners for the System for a strike rate of 19.46%
There were $543.81 returned for WIN (after 5% commission) which means a Profit or loss of $101.81 or a percentage profit/loss of 23.03%

The Rules used were : priceRank < 90 and priceRank = 3 and runners = 6

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Cheers.