An edge is difficult to define - its infinite First and foremost a trader needs a winning system - doesn't matter if its a scalping or position trading sytem or both. By system I don't mean just a mechanical system only it can be discretionary or reading the clouds every morning or random plays. So long its an approach a trader knows it wins over time and he is comfortable with that approach. Its more about TIMING - right time to enter, right time to exit, right time sit with or without a position. With a correct winning approach then everything else follows because without a proper timing approach everything else is useless:- Emotional Control - its easier to control emotions or have discipline following a system that wins and is tune with trader psyche Money Management - portfolio management/bet size/risk/reward etc Its a long road to put everything together.