What Volume Spread Analysis looks for in a price bar
Volume Spread Analysis compares a bar's range, its close and its volume. This article explains the three questions it asks and where the method falls short.
Introduction
Every price bar carries three pieces of information that many traders read separately: how far price travelled (the spread, or range), where it closed within that range, and how much volume traded. Volume Spread Analysis (VSA) reads them together. Its starting idea comes from Richard D. Wyckoff: when effort and result do not match, someone with size may be active.
Framework
VSA asks three questions about each bar, always in the context of the bars before it.
- Is the spread wide or narrow compared with recent bars?
- Where is the close: near the high, the middle or the low of the bar?
- Is volume high or low compared with recent bars?
Observation comes first, interpretation second:
| Observation | A common interpretation | What would weaken it |
|---|---|---|
| Wide up-bar, close near the high, high volume | Demand was strong enough to absorb the selling | The next bars fail to hold above the bar’s middle |
| Wide up-bar, close near the middle, very high volume | Effort without result: selling may be entering | Price keeps rising on lower volume |
| Narrow down-bar, low volume, after a decline | Selling pressure may be drying up | A wide down-bar on high volume follows |
The interpretation column is a hypothesis to test, never a signal on its own.
Example or application
Hypothetical example, for illustration only. After a steady rise, a daily bar opens near its low, trades through the previous high and closes in the middle of an unusually wide range. Volume is the highest of the last twenty sessions. A VSA reader notes “effort without result”: a lot of buying effort produced a weak close. They would then watch the following bars for confirmation, such as lower highs on falling volume, before drawing any conclusion.
Limitations and risk
- Volume differs by market. Spot forex has no central exchange, so platforms show tick volume (the number of price changes), not traded contracts. Futures volume is more complete.
- Context changes the meaning. The same bar can mean different things at the top of a trend and in the middle of a range.
- News distorts bars. Data releases and central-bank decisions create wide, high-volume bars that may say little about professional activity.
- No method is reliable on its own. Combine observations with market structure, a clear plan and strict risk management.
Sources
- Richard D. Wyckoff, The Richard D. Wyckoff Method of Trading and Investing in Stocks (course material, 1931).
- Tom Williams, Master the Markets (2005), the book that introduced the name Volume Spread Analysis.
- CFTC, Commitments of Traders reports: weekly positioning data for futures markets (checked 2026-10-26).
Educational content only; not personalised investment advice.