Volume Spread Analysis

You have learned that a real breakout wants heavy volume and a quiet pullback wants light volume. But what do you do when the two contradict each other? When a towering volume bar sits under a candle that barely moved? Or when the price jumps a long way on a day when almost nothing traded?

When effort and result disagree, it is not a glitch. It is a fingerprint. This module is about reading that fingerprint - the relationship between how much traded and how far the price actually got.

Volume Spread Analysis (VSA), which grows out of the work of Richard Wyckoff and Tom Williams, exists to read one relationship: effort versus result. For any bar it looks at three things - the volume (the effort), the spread, meaning the size of the bar from high to low (the result), and where the price closed inside that range.

In an ordinary market, the two move together. Big effort should produce a big result: heavy volume, a wide bar. Small effort should produce a small result: light volume, a narrow bar. VSA earns its keep by hunting for the moments this breaks down.

• Big effort, small result. A huge volume bar under a tiny candle. Something absorbed all that trading and stopped the price from moving. Someone with size was on the other side.
• Small effort, big result. A wide candle on almost no volume. The price drifted a long way because the opposite side simply stepped aside - there is no real force behind it.

Both are anomalies, and both point to large players doing something the price alone hides. This is volume as the footprint read at the level of a single bar: the volume tells you whether the move in front of you had a crowd behind it or walked alone.

The reason this works is worth stating plainly. A stock only moves a long way when one side overwhelms the other; it barely moves when the two sides are evenly matched. So heavy volume with a wide range is unremarkable - a fair fight with a clear winner. But heavy volume with a narrow range means both sides traded furiously and neither budged the price, which can only happen if someone large was quietly taking everything the other side offered. That is the whole insight: the size of the move, set against the trading it took to produce it, reveals a hidden participant that the candle by itself would never show.

Three anomalies do most of the work. Learn these and you will read the others by the same logic.

1. Stopping volume (a possible bottom). After a long fall, a bar prints the heaviest volume in ages - but the range is narrow and the close is off the lows. Big effort, small result. Read: large buyers stepped in and soaked up the panic selling, halting the decline. This is a stopping volume bar.
2. No demand (a fake rally). In a downtrend the stock tries to bounce with a wide-ish up bar - but volume is well below average. Small effort, big result. Read: the price rose only because sellers paused. There is no buying behind it; the bounce tends to fold.
3. The squat (a hidden ceiling). At a breakout, volume is enormous but the bar is a tiny doji that goes nowhere. Big effort, no result. Read: large sellers are meeting every buyer at that level and capping the price.

The figure makes the core comparison visible: three ordinary bars where volume matches the move, then one anomaly - record volume under a bar that barely moved.

Walk one composite chart. illustrative

A stock has rallied for weeks and is pushing into a well-known resistance around ₹200. The first candles below climb toward it on healthy bars. Then comes the anomaly. On the day it touches the level, volume is the heaviest in a year - but the candle only travels from ₹200 to ₹202 and closes flat. Record effort; almost no result.

If that much volume were buying, the stock should have burst well above ₹200. It did not. The read is that large sellers were parked at the level, handing shares to every breakout buyer and capping the price - a squat. The reader treats it as a warning, not a certainty, and marks the anomaly bar. On the next candle the stock rolls over and closes at ₹191; the one after, ₹182. Buyers who chased the "breakout" on that record volume were, in fact, buying exactly what the sellers were unloading. The reader who noticed that the effort produced no result stayed out.

VSA anomalies are clues, not laws. Sometimes stopping volume appears, the stock steadies for a day or two, and then a fresh piece of bad news makes the same large buyers abandon the level - and it falls another 20%. An anomaly raises the odds of a turn; it never guarantees one, and it gives no target.

There is also a real limit to what a single bar can prove. Volume and spread tell you that something was absorbed or that a move was hollow - they cannot tell you who did it or why. A huge volume bar can come from an index rebalance or an expiry that has nothing to do with a hidden buyer. And VSA is famously easy to over-tell: with hindsight you can label every bar with a confident story. The bar is a map of one session's supply and demand, not a verdict on the company.

So the discipline is the same as ever. An anomaly is only valid while price respects it. Buy a bottom on stopping volume and the low of that exact bar is your floor; if price breaks it on heavy selling, the absorption failed and you exit. The anomaly earns your attention; the price earns your action.

The main trap is reading the candle in isolation and never glancing at the volume bar beneath it.

Two more slips: forgetting that anomalies need confirmation from price before they mean anything, and over-narrating - inventing a confident VSA story for every bar until the method becomes a way of always being right in hindsight and never being testable in advance.