Thanks mcbee.
Yes that's correct, in an 8 runner race this trigger would bet on favorites 5,6,7 & 8. And in a 7 runner race it would bet on 5,6,7 etc.
The > price1 < price 2 is a band of odds which the trigger is valid for e.g for the 5th fav, say 6 (price 1) to 8.5 (price 2). These bands would vary for each favorite.
hope this answers your questions, thanks again, James