I have TradeStation which can optimized parameters for those moving averages to choose the best combination (tried that unsuccessfully long time ago myself) anyway for experiment I can optimized moving averages parameters for you. this is one of the simple systems within TradeStation , unfortunately I can't change it because I don't know programing :-( when optimization complete well give you results. as I said FOR EXPERIMENT ONLY, then you can see for yourself
I haven't found trailing indicators useful either in the 9 months I've been trading. They just take what is obvious, price and volume,and turn it into somthing abstract. For me anyway.