A system and method for dynamically determining quantity for risk management are described. According to one example embodiment, as a trader positions an order icon at a desired price or price-derivative value on a graphical interface, an order quantity for the order is dynamically determined based on the order price and a selected risk management formula. A trader can change the price or the price-related value for one or more orders by moving the order icons relative to a price axis on a graphical interface. In such an embodiment, the initially calculated order quantity for each order will be dynamically recalculated based on the modified orders for the trading strategy.