Dear @honarparvar
As I see it in my language it can be translated as max and Min bands.
Of course, they also move according to the behavior of the demands of that market. Anyone according to where it is established, but what I can understand is that they will tell me in the future that within those limits they will continue to behave ..
True?
better to say: the probability of such behaviour is stronger
thanks for stopping by and reading my post