ADIF Calculates the average difference between the current value and the last entered value. Puts a value in for every day. 

SYNTAX:

ADIF(Cx,optional rollover)
where :
Cx is a conditional variable x
Rollover is an optional parameter that specifies the Rollover Point.

NOTES:

The optional Rollover specifies the Rollover point.  If the optional parameter is not specified, the system assumes the rollover point is at the next power of 10.

This function will only search forward and backward 183 days (6 months) from the day it is attempting to calculate.

EXAMPLES:

       V6=ADIF(C5)              V8 = ADIF(C7,10000)