I am looking to calculate balance movements at the client level (thousand clients at any given point of time/date). I have tried to use multi-row formula but it seems to work at the portfolio level only. For example when I aggreagate/sum numbers to two rows for two points of time (31/03/2016 and 30/04/2016) the sum bewteen these two balance is calculated correctly but when I try to do it at the client level it does not work. Once this is calculated I would like to rank clients in order to be able to identify top clients with positive movements and top clients with negative movements between any given two periods of time. Any help will be appreciated.