It's more difficult in any market that is manipulated (by Gox or other forces). IMO Gox does everything to keep it up (cools off the sell-off) and there is no easy way to short, so this certainly makes TA difficult. I believe it still works.

The same patterns present themselves over and over....for a reason. I do not think Bitcoin is magically immune from regular market forces and crowd psychology. And with the extreme lack of solid fundamentals other than overblown press releases, I contend that TA is often the only thing we have.