A. Fundamental trading requires lots of time - you need to thoroughly research a company and the economy and the industry in which it sits. Technical trading can be done in minutes - you simply spot a pattern and buy or sell.
B. Even if you can find value through fundamental analysis, you're up against the fact that, in the market, perception is reality. Let's say you buy some shares at £10, and in 12 months' time they've fallen to £8. By that time, the fundamentals may have changed, and the true value of the shares may be less than £10.
Technical trading is backed by evidence. See, for example, the links on this site: http://www.trendfollowing.com/perf.html.
Some of those results are much more impressive than those of the $69 billion (http://en.wikipedia.org/wiki/Fidelity_Investments) Fidelity Contrafund: http://personal.fidelity.com/products/f ... ?316071109. Thirty percent over 10 years means that you'd have barely kept up with inflation!
Some people may say that you can't make money without knowing about what you're buying and selling - try telling that to a trend follower by the name of John W Henry, who's just bought a large football club...

What do you guys think?
Jeff