1. A computer implemented method of automatically generating a graph from report data, the method comprising the steps of: identifying a report format as comprising at least one first group at a first level having at least one detail line with at least two data fields in each of the detail lines, wherein the first group further includes either a vertical total for each of a plurality of the respective data fields in the first group or a horizontal total for each of a plurality of the respective detail lines, with each particular vertical total totaling a corresponding data field for each detail line and with each particular horizontal total totaling each of the data fields for that particular detail line; receiving a user input indicative of one of the totals; and generating a graph using a predefined rule corresponding to the one of the totals indicated by the user input.