Reasoning anomalous behavior of cohorts and related to the abnormal behavior associated actors based on the centroid of the cohort context of divergent movement

A method, system and computer program product for determining whether a change of a value of a data element that is associated with a tracked within a cohort entity in context, is statistically significant and contextual. A computer recorded at a time point N + 1, a plurality of data elements associated with the tracked entity in context. The value of the data element at the time N + 1 is compared with a value of a historical data element at the time N. If the value of the data element at the time N + 1 is different from the value of the historical data element at time N, it is determined that a change has occurred. When a change of a data element has occurred, it is determined whether the change of the tracked entity related data element in n-room statistical and contextual significantly in multiple dimensions.