I have a very little knowledge about mostly things
Poly chromatic is not a type of indicators but a feature (one from many) within indicators regarding type of coloring that depends on look bar back periods (number of bars back) if applied on value/period 2 it will not show any extra colors except 2 as per my little knowing and is used and can be used in any type of indicator (mostly it was applied on MOM indicators in past by Mladen/Mrtools) - but experts can better explain and guide me,too