Abstract: In a method of placing a security trade order using a trading algorithm in a computerized trading system, candidate order characteristics of a candidate order are received through a first GUI, and current market characteristics are obtained. Performance and fill rate scores are forecasted for executions of the candidate order by each of a plurality of trading algorithms using a ranking model based on historical data for a plurality of orders previously-executed via one or more of the plurality of trading algorithms, the candidate order characteristics and the current market characteristics. Each of the plurality of trading algorithms are ranked for the candidate order. A highest ranked trading algorithm is selected and is displayed on a second GUI. A selection of one of the displayed highest ranked trading algorithm is received from a user, and the candidate order is placed using the selected trading algorithm.