While the world is blaming computers, fat fingers, squirrels eating phone lines or whatever else. The market finds support at Feb lows. <IMG SRC=http://www.elitetrader.com/vb/attachment.php?s=&postid=2830250>
I don't think anyone would claim that techinical analysis doesn't work in the sense that support/resistance levels or channels cannot be explained post-factum. Most concerns regarding TA come from that it doesn't work 100% of the time or that there are a few ways to draw a trendline.
Of course TA doesnt work 100% of the time there wouldnt be a market if it did, thats actually the best part of it.. the trick is to work out what your going to do round supp res or value areas..
What if... The red horizontal was drawn from the bottom of the prior low instead of from a random position as indicated, would the failure to reach support prove TA doesn't work? That is a big gap. What would be better proof is showing how TA caught the drop. Where are the technicians?