hi
here is your trigger,there is 1 new constant to set.
Maximum point difference between rank 1 and rank 2
i have added 2 new variables to help you with deciding how many points difference to use.
open the user variable screen
first line type        fl
second line type  2fl
third line type       2fl-fl
you will then be able to see the difference between rank 1 and rank 2, i have set the difference to 5 as a starting point so alter it to what ever you want.
fl=selections lay bet price
2fl=rank 2 lay price
2fl-fl=difference in points
please use test mode until you are happy with your settings
mcbee
download the trigger below