The knowledge is based on the unconscious behaviors of our mind. We have found exactly what it looks like on the graph; in this situation it’s like there is 1 trader on the market and not millions of traders.
The Forex market is the biggest market in the world; 5 billion dollars exchanges hands every day – that’s why even a country can’t manipulate it for more than a few pips.
When you trade stocks, for instance, you can’t know if there is a fraud with this stock. When you potentially do find out that it was a fraud, the one who did it will probably go to jail, but you will be without your money.