A condition that the bet(s) only trigger if selected back or layed book %age is above or below a certain level..
E.G. Dutch Pos in Order of fav 1,2,3,4. If selected back book %age is above 80% then bet is triggered, if not it's not triggered.
Likewise lay in order of fav 2,3,4 if selected lay book is less than 80%, if not then bet is not triggered.