Yes, that's what I've done, but when I add it to the product I then need to add 10 prices in the option values.
Do I have to add the 10 option values to every single product or is there a way to do it once on one product and then just copy it over to all the other products?
Isn't the global attribute just a basic template that I then need to add options to on every product or am I misunderstanding the role of global attributes? Can you add different prices in the global attribute?
thanks for your help