Hi VA Experts, Has anybody out there worked out how to do Moving Annual Totals in VA?  I know there are lots of Out-of-the-box options like Year-to-date and Parallel Period Comparisons but I can't find a way to make the Periodic Operators sum up a value for a rolling 12 month Period. What I need to see is something like this ... where MAT is the running total for the previous 12 months... Month Value YTD MAT Apr-15 £100 £466 £1,334 Mar-15 £123 £366 £1,345 Feb-15 £145 £243 £1,314 Jan-15 £98 £98 £1,257 Dec-14 £99 £1,237 £1,237 Nov-14 £78 £1,138 £1,233 Oct-14 £90 £1,060 £1,248 Sep-14 £145 £970 £1,249 Aug-14 £120 £825 £1,194 Jul-14 £87 £705 £1,163 Jun-14 £97 £618 £1,163 May-14 £152 £521 £1,151 Apr-14 £111 £369 £1,083 Mar-14 £92 £258 £1,055 Feb-14 £88 £166 £1,044 Jan-14 £78 £78 £1,035 Dec-13 £95 £1,035 £1,035 Nov-13 £93 £941 £941 Oct-13 £92 £848 £848 Sep-13 £90 £756 £756 Aug-13 £89 £666 £666 Jul-13 £87 £578 £578 Jun-13 £86 £491 £491 May-13 £84 £405 £405 Apr-13 £83 £321 £321 Mar-13 £81 £239 £239 Feb-13 £80 £158 £158 Jan-13 £78 £78 £78 ... View more