Most traders use a mechanical trading system (MTS). This is no accident. Good MTS automates the entire process of trading. Such a system gives answers to all questions posed to the trader at the time of trade. The system facilitates the trader to trade consistent, because there is a set of rules that determine exactly what to do. The mechanics of trading does not leave room for argument trader. If you know that your system makes money over the long run, it is easier to take the signals and trade according to the system during periods of losses.
If you rely on your own judgment during trading, it may be that you are timid as the time when you have to be resolute and fearless, when you need to be careful. If you have a working MTS and you follow it, your trading will be consistent despite the inner emotional tension that could occur due to a series of losses or large profits. Faith, consistency and discipline achieved by careful testing of MTS - is the key to the success of the trader.
Turtle Trading System was a complete trading system. Its rules cover all aspects of trade and not leave virtually no questions for subjective decision by the trader. It had all the components of a complete trading system.
The group of traders called themselves "Turtle" has achieved the dizzying success in the US market.