VSA (Volume Spread Analysis): Reading Volume From Candles and Its Limits

VSA, or Volume Spread Analysis, judges a candle by three things: its range (spread), where it closed and its volume. It's supposed to reveal the footprints of “professional money”. The idea is closer to data than pure candle analysis, but a candle's volume doesn't tell you who was aggressive, and on forex it isn't real volume at all.

What it is

The method was developed by Tom Williams, a former syndicate trader, based on Richard Wyckoff's ideas. He described it in the book “Master the Markets”, and commercial software was also created to mark the signals automatically.

Typical signals: no demand (a narrow-range up candle on low volume), no supply (the reverse), stopping volume (very high volume after a decline, with a close well off the low), upthrust (an upside break that closes low on high volume).

How people use it

looking for “no demand” before a fall and “no supply” before a rise
stopping volume as a sign the decline is ending
automatic VSA signals from paid indicators
applying VSA to forex and CFDs with tick volume

What the research and evidence say

There's no independent research showing that VSA rules give an edge after costs. The idea that volume carries information is justified and well documented in the literature, but VSA reduces it to one number per candle and an interpretation of the candle's shape. The same high-volume candle can mean capitulation or the start of a strong move, and only the context decides – often after the fact.

Weaknesses

one volume number per candle, with no split into buying and selling
on forex and CFDs it uses the broker's tick volume, not real contracts
the signals depend on interpretation and timeframe
paid indicators with hidden rules

What order flow shows

VSA guesses from the shape of the candle whether heavy volume was buying or selling. The footprint doesn't guess: it shows the volume at every price split into market buy and sell orders, delta and absorption. In order flow terms, “stopping volume” is aggressive selling soaked up by large limit orders at the bottom of a move, visible directly in the footprint and the order book. The condition: real exchange data, e.g. from the CME, not a broker's tick volume.

Indicators vs order flow

Every indicator and every pattern in this section is built from the same data: a candle's open, high, low, close and sometimes volume. They're derivatives of price, showing the effect rather than the cause. Order flow looks at what price is made of: who was buying and selling aggressively (delta), where limit orders were waiting (the order book) and at which prices the market accepted trade (the volume profile).

On CME futures this data is real and comes from one central market. Spot forex doesn't have it: platforms show tick volume, the number of price changes at a single provider.

To be fair: order flow isn't the Holy Grail. It takes learning, it can be noisy, big players hide some of their orders, and an edge only comes from a process and risk control. But it gives you information that simply isn't on a candlestick chart.

How to use it sensibly

if you use VSA, do it on real exchange volume
check in the footprint who was aggressive in a high-volume candle
treat VSA signals as questions, not answers

Glossary: Volume
Glossary: Tick volume
Glossary: Footprint
Glossary: Absorption
Glossary: Exhaustion
Atlas of biases: Illusory correlation
Atlas of biases: The narrative fallacy
Atlas of biases: Cherry-picking
Order flow: Absorption on a real market: 51,300
Order flow: Exchange or Broker: CME Futures vs CFDs and Forex with a Market Maker
Also under the microscope: Elliott Waves
Also under the microscope: Harmonic patterns
Also under the microscope: Dow Theory

Frequently asked questions

What is VSA?

Volume Spread Analysis: judging a candle by its range, where it closed and its volume, developed by Tom Williams on the basis of Wyckoff.

Does VSA work on forex?

Spot forex has no central volume. Platforms show tick volume – the number of price changes at a single provider – so VSA there runs on substitute data.

How is VSA different from order flow?

VSA looks at one volume number per candle. Order flow breaks volume down by price and into buying and selling, so it shows who was aggressive.

Educational content, not investment advice. No signals, entries, stops or position sizes.