Coefficient of Variation might be useful when analyzing the data measured on a ratio scale

A quick note here. I saw amazing results using this C.V. as a data output. Also, STD could be used elegantly as well: fast moving objectives have bigger std than slow moving objectives -- so ...

In probability theory and statistics, the coefficient of variation (CV) is a normalized measure of dispersion of a probability distribution. It is defined as the ratio of the standard deviation to the mean.

The coefficient of variation does not have any meaning for data on an interval scale.

from wiki