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The problem is in the following step, the dailychange is working fine. Since I cannot calculate the avg using the AVERAGE function I add all the detail records of @dailychange and then calculate the an average using count which the number of records (detail level, see columns below). So in the...

I got the running total @dailychnage_rt= whileprintingrecords; numbervar x := x + {@dailychange}; and the display total @dailychnage_sum = //{@display}: whileprintingrecords; numbervar x; From here I added an average @dailychange_avg= whileprintingrecords; numbervar y:={@dailychange_sum}...

Thank you for the reply. I assume if I use varaibles to get the prev val I will at least be able to calc the avg since this is the basis of the std dev formula. I pretty much have the steps to calulate the std dev manually but have no idea how to use the variables to get the previous value. If...

In crystal reports 11, I need to calculate the change between records and use the result elsewhere, but the field does not list the summary function in the shortcut menu and if I create a formula I get the "this field cannot be summarised" error" My dataset is a list of rates at various dates...