This tool gathers data from a summary table called MATRXSUM.  This summary table is created each month from data in TRANS1, TRANS2, and TRANS3. It simply counts all transactions based on their transction Origin Code (TRORIG).  So if you selected those two channels you'd see a count of all transaction records with an Origin code of 13 (for ATM/PIN activity) or 16 (for debit/signature activity).