As the more experienced TA chartists here like Zeev, LG, Augie, Gottfried and Mlsoft refine their methodologies, I'd think one big impediment is the fact that volume is reduced off this bottom. Yet with so many having left the market, perhaps this doesn't indicate so much a lack of institutional interest, but a permanently reduced volume base. And under that reduced base, the probability of greater error may arise.
For those who don't understand the intricacies in the systems we've refined, I'll stick my neck out, certain the others won't be happy with my revelations because of all the hard work we invested to gain a set of predictive formulas that have proven so successful.