Holy Grail ? it depends on the definition: Holy Grail means impossible and according to CFTC it's impossible to have any statistical edge with TA and so any one who affirms that would be considered as having found the Holy Grail
http://www.elitetrader.com/vb/showthread.php?s=&postid=379217&highlight=holy+grail#post379217
"Technical analysts . . . first make a deterministic (one might say
spiritual) leap of faith that non-random price patterns exist. They
then illogically posit that these patterns, once revealed to the few
(or indeed -- through marketing -- to the many), may be successfully
exploited in trading. To accomplish this, of course, the 'pattern'
must remain undetected by others (otherwise the increased market
activity defeats the 'pattern' by driving the price to a point where
speculation is no longer profitable). See Marshall (1989) at
263-264. Public policy presumes that markets are not so witless.
'The presumption is [] supported by common sense and probability [as]
recent empirical studies have tended to confirm Congress' premise that
the market price of shares traded on well-developed markets reflects
all publicly available information . . . ' Basic, 485 U.S. at 246."
(note 75, page 41)"
"[A]ny marketer's claim of increased profitability or reduced risk
through the use of these systems is likely to be fraudulent". (note
75, page 41)
Quote from ChartingMarkets:
To me this nonsensical talk about the Holy Grail of trading implies a mythical system that never loses. People who are only willing to trade or believe that you can only make money in the stock market by being right all the time should take a rain check out of this profession right away. The best traders embrace the concept of "PROBABILITY" and know over a long series of independent events/trades that they will have accumulated a larger amount of money to show for their statistical edge. The best traders know how to take losses and not fear it or ever regret it. Holy Grail...keep looking because a statical edge is not enough for these people, because those who seek the Holy Grail seek something much more, that does not exist.