My friend said : "If 90% of traders lose; and you want to be a consistent winner; you've got to do what it takes, with trading to make sure you have a real edge on your side; within trading; and externally to make it.The human factor in discretionary trading is so very powerful that limiting yourself to an indicator based "rule-based" system/approach is detrimental to your profit potential. If you want to trade a rule based system based on certain indicators/statistical values; automate it. Use your human intelligence to maximize your POTENTIAL "
For me... : "Trading is an Art, not a Science". ^_^.