I've got some stats for 100 raters from my website.

If you were to Back on betfair :

There were 21320 horse form lines in the database at this point in time.
There were 2153 selections for the System
There were 487 Winners for the System for a strike rate of 22.62%
There were $1906.81 returned for WIN (after 5% commission) which means a Profit or loss of $-246.19 or a percentage profit/loss of -11.43%

If you were to lay on betfair :

There were 21320 horse form lines in the database at this point in time.
There were 2153 selections for the System
There were 1666 which Lost (did not win race) for the System for a strike rate of 77.38%
You had to pay out $2036.86 but brought in $2045.35 after 5% commission. This means a Profit or loss of $8.49 or a percentage profit/loss of 0.39%

This covered all price ranges.




Same query but Top neural rater and top Unitab Rating (100) :

If you were to Back on betfair :

There were 21320 horse form lines in the database at this point in time. There were 645 selections for the System
There were 189 Winners for the System for a strike rate of 29.3%
There were $545.24 returned for WIN (after 5% commission) which means a Profit or loss of $-99.76 or a percentage profit/loss of -15.47%

If you were to Lay on betfair :

There were 21320 horse form lines in the database at this point in time. There were 645 selections for the System
There were 456 which Lost (did not win race) for the System for a strike rate of 70.7%
You had to pay out $575.65 but brought in $612.75 after 5% commission. This means a Profit or loss of $37.1 or a percentage profit/loss of 5.75%


It should be noted that Backing a selection uses the lower of the available prices. Laying a selection uses the Higher of the available prices.