5. The system of claim 4 , wherein the analysis unit is further configured to: predict an expected volume of the at least trend at a given time; simultaneously track an actual volume of the at least trend; and compute a surprise factor to determine a general direction of the at least trend using a grading function.
5. The system of claim 4 , wherein the analysis unit is further configured to: predict an expected volume of the at least trend at a given time; simultaneously track an actual volume of the at least trend; and compute a surprise factor to determine a general direction of the at least trend using a grading function. 6. The system of claim 5 , wherein the grading function is a difference between the actual volume and the expected volume of the at least trend.