I am a big fan of Tom Williams and his two books (‘Master the Markets’* and ‘The Undeclared Secret that Drive the Stock Market’*) in which he discusses his adaptation of Richard Wyckoff methodology. Tom Williams named his approach the ‘Volume Spread Analysis’ or ‘VSA’ and it is based on the bar by bar study of volume (or relative volume), the close and the range of the bar (high less low) to judge the contest between demand and supply.
At SmartStocks, I use this ‘VSA’ study to support my own conclusions about the markets, by spotting different support and resistance zones that a fibonacci or a weighted average would have otherwise not spotted. Every week, I use this ‘VSA’ study to better understand how a stock’s or index’s move perform relative to volume, to then back-test the validity of that particular move.

Figure 1
