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I would have used different words, but I do agree with the comment on the first and the second sentence.
Explanation: It is difficult to conceive profitable mechanical systems. Mechanical systems exploit repetitive behaviour. They can be exploited themselves by other systems or traders, which explains that most of them have a limited lifespan.
I do not agree with the comment on the third sentence. If we were capable of designing mechanical systems and running them, we would certainly do that and watch them working. If we don't, this points to our limited means and limited experience, which is insufficient to achieve that difficult task. I think cunparis put this sentence quite right.
I'm agree, I never seen a full mechanical strategy that give the same results as discretion, or that works more than some month. If it exists everyone would want to use it and the market will no longer exists. ( Or if exist such Holy Grail who has it surely want not share it).
(2) cunparis did not say that such as system does not exist. He just stated a belief. There are other professional traders who share this belief.
(3) cunparis did not say "I", he said "we". This includes most of us, for example myself. This is not arrogance, but just common sense. If you read through the journals in this forum, I consider that he is 99% right. I believe in fat tails, which are rare events. A working mechanical system is such a rare event.
Your conclusions were a bit malicious. That is why I am answering here. I understand that you were looking for the intellectual challenge and did not want to offend anyone, or did you? .
IBs
CL 15min, enter on 1-range bars
Measure the size of the IB
Take first breakout
Target = IB size
Stop loss = IB size
Risk/Reward = 1/1
Avoid lunch
No news filters
See attached spreadsheet, CL-03 through CL-08, one sheet for each contract
Trade accordingly.
Regarding IBs in the AM vs PM, I did one small comparison on the CL-03 contract
Before lunch - 24 wins, 12 losses
After lunch - 8 wins, 5 losses
So for at least that one contract the morning only has a slightly better win rate. This hypothesis needs more testing.