Quote from 1a2b3cppp:
An "edge" is what allows you to be profitable.
The most commonly thought of "edge" is a profitable system. Contrary to the nonsense you hear all the time, this is also the least common edge.
People like to talk about how the "edge" is in your psychology, and there is some truth to this, but as stated above, all the psychology in the world won't turn a losing system into a winning system.
Most people do not have winning systems.
There are four possibilities:
1) A winning system without the psychology to properly trade it = losing trader
2) A winning system with the psychology to properly trade it = winning trader
3) A losing system without the psychology to properly trade it even if it were a winning system = losing trader
4) A losing system with the psychology to properly trade it even if it were a winning system = losing trader
1 and 2 are uncommon simply because most people do not have winning systems. 3 and 4 are more common.
The only psychological "edge" needed is the ability to follow your system. For example, if you are currently experiencing drawdown, or a losing streak, but your system hasn't told you to exit the trade yet, then you don't exit the trade. If you freak out and exit because you don't want to lose any more money, then you are not following your system and you do not have the right mindset to trade. Please note this requires having a profitable system.
Sometimes you get people who hold through drawdown because they are following the rules of their system, and these people have the right mindset to trade, but because they have a losing system they will not make money anyway.
Winning systems are extremely uncommon.
In my opinion, the reason most people lose is not because they cannot follow a system, but because they do not have a profitable system to follow in the first place.
Look at all the nonsense out there. All the indicators that don't work. All the "gurus" who won't give specific answers or objective instructions (because they are either unwilling to teach, or because they don't actually have profitable systems and are misrepresenting themselves). Look at how few people actually post real time calls consistently and profitably compared to how many people are "gurus."
It's no wonder traders don't make money.
Your psychological makeup (ie. the ability to follow your system's rules) is part of the edge if and only if you have a profitable system in the first place. If you do not have a profitable system then it doesn't even matter. It's still a useful and necessary skill, it just doesn't apply if you don't have a profitable system. It would be like being the best at playing a sport no one else plays.