I've seen enough people, though, that are too "lucky" for me to dismiss TA altogether.
People generally have a poor innate understanding or feeling
for randomness and statistical processes. Both the mutual
fund/brokerage industry and Las Vegas rely on this for much
of their success.
I think it takes a talent for creative synthesis of lots of simultaneous factors, just following the rules will fail. Just like you couldn't reduce the style and performance of a great athlete or artists into a few simple rules.
The first warning sign of Charlatanism - the practioner's
claim that his method is too complex or "artistic" to be
objectively analyzed using the scientific method.