The ACHV#, PCHV#, and REB# functions accept certain function codes as arguments in place of the date parameters. You can use the following functions as arguments
ACH Actual change
AVG Average
GRFL Annualised growth rate (first and last values)
GRLS Annualised growth rate (least squares trend line)
MAX Maximum value
MED Median Value
MIN Minimum value
PCH Percentage change
PCHA Percentage change absolute
SDN Standard deviation
SDN1 Standard deviation (N-1)
SUM Sum of values
VAL Last value of period
WAV Weighted average
ACHV#(MKS,VAL)
This gives the continuous actual change for Marks and Spencers between the current day and the value at the end date on the input screen.
PCHV#(MKS,AVG)
This gives a continuous percentage change for Marks and Spencers between the current day and the average value of the series over the display period, that is, the period between the start date and the end date specified on the input screen.
REB#(MKS,MAX)
This rebases the series so that the maximum share price for Marks and Spencers over the display period equals 100. This allows you to readily estimate the share price deviation below the peak value.
Note 1: You do not use the # sign when using a function as an argument in another function.
Note 2: In static requests, the start date for the calculation defaults to 12 months prior to the specified display date.