I would like to find a suitable adjective to describe a leader board that has changed frequently. Of course the leader board can change, but it doesn't have to -- the possibility of entrenchment / solidifying positions is also a distinct outcome. With this in mind, I want to draw attention to the fact that it has in fact changed this time around.
A ______ leader board suggests firms are ramping up operations.
I considered using "dynamic" / "volatile" here, but dynamic sounded too vague and volatile seemed a bit unnatural.