If you add Cond='G' you get these results.

There were 49527 horse form lines in the database at this point in time. We update when we get time.

There were 625 selections for the System
There were 77 Winners for the System for a strike rate of 12.32%
There were $838.89 returned for WIN (after 5% commission) which means a Profit or loss of $213.89 or a percentage profit/loss of 34.22%

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The Rules used were : barrier >= 5 and barrier <=10 and rating = 96 and weight >= 54 and weight <=58 and distance >= 1000 and distance <=1600 and cond = 'G'