Im surprised this conversation is even being had by so called "experts"
Its very quite simple. Charts produce patterns that have a probabilistic edge. What big boys used them? Well, Renaissance Technologies - you know the most successful HF ever.
How come most other big HFs dont use them? Because the strats for a 100mil - 1bil + portfolio are going to be different than your typical trader that doesnt even have a 100k trading portfolio.
One is making markets, the other is following the market therefore it requires different approaches. Nothing is 100% when using charts and it seems the most people who complain about charts are wanting a magic pill to make it 100%.
charts are just a representation of market moves, a way of organizing price-time-volume data. those create random patterns, that are insignificant for future price moves and research shows over and over again that chart patterns are unreliable.
chart patterns have many many nuances to them. when somebody draws a head and shoulder pattern, the other guy will see an Elliott Wave or flag or fib retracement.
regardless of what kind of pattern your schizophrenic brain will "see", the outcome of future price move will be independent of the pattern that occured visually, randonmly and "seen" by your schizophrenic brain.
