Hi Nikolas,
I apologise for the delay in my response: I've been trying to find a solution for you.
The way you want to do it requires writing a special complex VBA procedure which is out of scope of the trigger development service.
There is an alternative way to do the same thing. It would require from you creating a text file with each selection's name on a new line, and its price next to it separated by a Tab character. Please see the example attached. Note that the names of markets and corresponding selections must be identical to those on BetFair, e.g. "The Draw", not "Draw" and "Brest v Arles", not "Brest VS Arles".
If you're happy to create such file for your needs, I can then supply the triggers.