To TE, you ask why so many fail with so much readily available info.
They fail because the info is not enough, they fail to properly manage themselves, their expectations and their risk.
Initially they think every trade will be a winner, when they're not, if they're still in the game ( and havn't over exposed and failed to exit on a loss, allowing it to develop into a critical loss), they start to fear the Market and start to view Market data as threatening, which skews their objectivity all together, and ultimately makes them cut winners and let losers accumulate.
It's not the data or the analysis method that is the problem, but rather the trader's psychological view.
That's why so many fail and it has got naff all to do with technical analysis.
Mysteron, please would you post a link to that pdf on volume spread analysis.
Thanks.
At the end of the text on the link below is another link to to the PDF file: VSA BASICS from MTM
http://www.informedtrades.com/510408-bottom-reversal-step-step.html