Quote from OddTrader:
LOL.
imo, the poor performance of the trading system would be mainly due to the system designer didn't study or/ and understand the following document properly which has been claimed the best TA system on ET.![]()
http://www.elitetrader.com/vb/attachment.php?s=&postid=1278985
Quote from Trader666:
My backtest used Spydertrader's chartscript code to quantify the "P,V boolean relation." If anyone has a more accurate way, I'm all ears. But it's really a very simple concept that I doubt Jack thought would be backtested. P.S. if you check the newsgroup archives, Jack strung along a guy from Harvard for over a year on this until it was concluded that it's boolean ballyhoo.
Nothing of Jack's tests out that I'm aware of. That's one of the reasons why I think he's such a master of obfiscation... to try to keep from being exposed and to keep the naive begging for more.

Quote from Trader666:
Buying the 0 to 7 turn of the "P,V Boolean relation" (which you have claimed is at the heart of TA) and exiting 5 days later* produced the attached equity curve when tested on 1000 S&P stocks over five years. So much for having tomorrow's paper today!
* 5 days worked better than 1,2,3, or 4 days.
Quote from TSGannGalt:
TA is subjective.
If not go ahead and try writing a code that defines a Reversal Patterns (Head and Shoulder, x2/x3 Bottom, Cup & Handle... etc.) and Continuation Patterns (Flags, Triangles and etc.). Let's see if we all can all see on our charts and agree on.
How about duplicating a technical discretionary trader's mind into a computer? This may seem irrelevant but if TA was "fully" objective then it's trading decisions can also be duplicated... It cannot be duplicated because it's subjective.
Now, does TA work? Yes.
Can TA be applied to an automated trading system? Yes.
Just because I can't play golf, it doesn't mean other can't. Just because I can trade, doesn't mean you can, in reverse...

Quote from NoWorries:
Andrew Lo's papers might be of your interest, e.g. http://web.mit.edu/alo/www/Papers/techanal.html