Abstract: An artificial expert system and method for determining whether to buy, sell, or hold a specific Individually Traded Unit (ITU) of publicly traded units residing in a securities or investment portfolio owned or controlled by a user, wherein the portfolio comprises of at least the trading statistics of each ITU. In one embodiment, the invention provides a user with a rational basis: to sell the optimum number of ITU's to unload at the optimum ITU sale price or buy the optimum number of ITU's to purchase at the optimum ITU purchase price or recommend that the user neither buy nor sell any of the selected ITU's.