new_trader
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Interesting read.
Just one question. Why is it that people belive that 100% mechanical systems do not exist or can not be created? Surely this is dependant on your trading style and method ?
Is this reference to a trading record that does not win 100% of the time or are we talking about other factors?
I understand that markets change over time but that does not mean that a trend does not exist during these changing phases. There for if you are trading a trend based system, the trend can exist in any timeframe, then your system should still work.
Or are you trying to say that it is difficult to identify the trend and when it begins to change ?
I ask this because i am in the process of creating a mechanical system. To me this means having a rigid set of rules that are very clear and can be clarified in code. Also i should be able to trade this system manually with equal success.
If i can manually produce X% winners using my system manually, why should this be different when programmed mechanically?
The problem is this, and I will explain with an analogy.
Imagine you are blindfolded and put somewhere in a large unfamiliar desert. The blindfold is removed and you are told that you have to find your own way out. You are only given one clue which is "If you walk in the right direction you should make it to safety before you die of thirst".
So, all you have to do is choose a direction and walk it. The question is, how far do you walk before you are convinced you are walking in the wrong direction? This is where the real psychological battle takes place. You might think you are going the right way and safety might be just up ahead a little further...a little further....a little further, or you might convince yourself you should take a new route in the opposite direction.
In this example, direction isn't an analogy for market direction; instead it is an analogy for drawdown.
People who insist on taking the mechanical route because it eliminates emotions from trading are fooling themselves and those foolish enough to listen to them. When your mechanical system has produced 10,11 even 15 losses in a row and your account is in 30% or 40% drawdown and has been for 3 months, will you continue trading it without any emotion? Honestly? Will you be able to convince yourself that the next trade or the next one or the one after that is going to be a big winner and not another loser? Will you be able to do this without any emotion whatsoever? Honestly?