A data processing system provides an interface with a securities exchange system over which securities are traded. The system allows a user to configure displays (3000) tailored for specific functions and to show displays (3050) for a particular security. The user may also view a display showing information about selected securities (3034), monitor trade activity, participate in a trade and report trades. In addition, a user may display information for a selected set of securities on a continuously updated basis (3035) and can easily select from a displayed list, a desired security and certain information and functions associated with the selected security.