Comparing items using a displayed diagram

A method comprising

• displaying a scatter graph of markers on a page of an online commerce site, the scatter graph representing a selection of items,
• the selection of items for which markers are included in the scatter graph being based on current user input criteria,
• the scatter graph having a first axis corresponding to an array of possible values of a first attribute of the items and a second axis corresponding to an array of possible values of a second attribute of the items,
• each marker being associated with a value of the first attribute and a value of the second attribute of a particular item, the value of the first attribute being one of the possible values of the first attribute of the array, and the value of the second attribute being one of the possible values of the second attribute of the array, the marker having a position along the first axis and along the second axis of the scatter graph corresponding to the value of the first attribute and the value of the second attribute of the particular item,
• receiving updated current user input criteria representing a motion made graphically by a user with respect to an interactive graphical element of the scatter graph, the motion made by the user graphically indicating an area of the scatter graph, and
• based on the motion made by the user, updating the scatter graph to reduce the possible values of the first attribute of the array or reduce the possible values of the second attribute of the array or both and to reduce the number of markers in the scatter graph accordingly.