Abstract: Entering positions regarding securities. At least some of the illustrative embodiments include: interacting by a trader with a physical device, the interacting sets purchasing power for entering positions regarding securities; and without further input by the trader selecting a plurality of securities from a preselected list of securities, the selecting based on one more indications for each security, and the selecting by a computer system; and entering a plurality of positions regarding the plurality of securities, the number and value of the plurality of positions limited by the purchasing power, and the entering initiated by the computer system.