The reasons that most systems go ok for awhile then fall in a hole is because they don't take in to account the strength of the race for different times of the year, even ratings can suffer this problem.

As far as backing multis there is no difference in backing 1 runner a race or backing 3 the strike rate + the average price still needs to be higher than the outlay, if you think of each bet as a separate bet it works best, why would you continue to back a selection that wins constantly at 15% but average price is $5, just makes no sense.

__________________
One Drive

"If the corporates are treating you poorly , just go elsewhere."
"If they need you , they will soon find out."
"If you need them , you will soon find out." --moeee
_______________________________________________