Can you create a new stop loss which combines a fixed % to sell at with a trailing stop to limit loss at. eg.- G/L 50/20 where you would automatically sell if you hit your profit target of 50%, but at the same time your trailing stop would be climbing so that if you reached a profit of only 40% for instance and your stock began reversing, you would only go back down to 20% at which point your stop would be triggered and you would exit with a 20% profit instead of riding all the way down to a possible 20% loss.