A pricing macro 
is a small reusable module capable of retaining and applying a calculation formula. If your price plan, refill logic, or allowance logic has common calculation formulae, you can manage and maintain the price plan or the refill logic more easily by creating pricing macros.
A pricing macro looks like a price plan, and it is represented using the same multilevel tree structure. Using its own properties, a pricing macro calculates an amount and may generate output properties.
Once a pricing macro is created, you can then add it to the price plan of a charge, to the refill logic of a refill plan, or to the allowance logic of an allowance plan. A pricing macro can be used in any charge or refill logic and may also be used within other pricing macros, resulting in cascading pricing macros.
You can modify and save different versions of a pricing macro.
Once you pricing macro is complete, SAP Convergent Charging provides you with the Rating Trial Run tool to test your pricing macro.