1. I don't know if it 5% or 20%. But whatever may be the number the fact is, many traders will lose money and it cannot be avoided. The idea that everyone can make money is impossible. Everyone making money means there is no market, because who would be taking the other side of the trade?
2. There is a deeper reason as to why most traders will lose regardless of what methods they employ. It is not about money management, risk management, bad government policies, world events etc.. It is because they are part of the crowd (95%) and they do not have their own system.
3. Successful traders find something that works and stick to it, not letting others pull them away from their strategy. This is where most traders go wrong and why the crowd loses money.
4. Most of the trends is created by professional money managers who are managing trillions of dollars in assets. They normally start the Trend early and will be the first to get out. The point is the Trend was not started by the crowd but by the 5% who had enough money.
5. So the simple answer is, For you to win(be part of 5%) in the market, Do not follow the crowd (95%) and follow your system which works. And mostly you will have to take a Contrarian view. People will laugh at you, Will make fun of you. But you will have to learn to stick to your system, whatever happens. For that first of all you should also have a system which you believe will work.
Note: As Gandhi said, "Even if the whole world is against you, you should have the courage to stand alone for what you believe". Like Gandhi believed that Non-violence will work when everybody believed on Guns and nobody believed non-violence could work. I personally not a great fan of Gandhiji. So please do not start a war on Gandhiji and non-violence. It was just a point to illustrate that Gandhiji was firm on his decision and stuck to it, even when the whole world was against his ideology because during his times non-violence was not something which was proved to be working.