14. The method of claim 8 , wherein the comparison between the accumulated card health data and the stored information includes comparing the times at which card health data of the cards associated with the accumulated card health data changed and one or more common merchants included in the stored information.
8. A method for determining a merchant breach, the method comprising: acquiring card transaction data from one or more merchants, wherein the acquisition of the card transaction data is performed at a first predetermined periodic interval; storing information relating to payment cards associated with the card transaction data; for at least some of the payment cards, automatically determining at least one value indicative of card health and store the determined values for the payment cards, wherein determination of the at least one value indicative of card health is performed at a second predetermined periodic interval; accumulating, over a period of time, card health data for the payment cards based on the determined at least one value indicative of card health; storing the accumulated card health data; identifying a potential merchant breach and the timing of the potential merchant breach based on a comparison between the accumulated card health data and the stored information relating to payment cards associated with the card transaction data; and displaying in a graph of a graphical user interface of a system, at least a portion of the accumulated card health data and the card transaction data indicating the potential merchant breach.