How to Read Trading Volume: The Skill That Separates Pros from Amateurs

Why Volume Matters

Price shows you what happened. Volume shows you how much conviction was behind it. A stock up 5% on 10x normal volume is very different from the same move on light volume. Learning to read volume is one of the highest-leverage skills in trading.

The Basics

What Is Volume?

Volume is simply the number of shares traded during a period. If 1 million shares change hands today, that's the daily volume. Higher volume means more market participants are active.

Average Volume

To judge if today's volume is significant, compare it to the average. Most traders use 10-day, 20-day, or 50-day average volume. "2x average volume" means twice the normal activity.

Volume Patterns to Recognize

1. Breakout Confirmation

When price breaks above resistance, volume should spike. High volume breakouts are more likely to follow through. Low volume breakouts often fail ("fakeouts"). Rule: Be suspicious of breakouts on light volume.

2. Exhaustion Spikes

Sometimes extremely high volume marks the end of a move, not the beginning. Called "climactic volume" or "blow-off tops"—everyone who wanted to buy has bought, leaving no one left to push prices higher.

3. Accumulation Pattern

When price trades sideways but volume gradually increases, large players may be accumulating positions. They're buying without pushing price up much—a bullish sign for the eventual breakout.

4. Distribution Pattern

The opposite of accumulation: price is flat or slightly up, but volume is heavy. Large players may be selling to retail buyers. Often precedes significant declines.

5. Decreasing Volume in Uptrend

An uptrend with decreasing volume suggests weakening buying interest. The move may be running out of steam. Not an immediate sell signal, but a warning to watch closely.

Practical Application

Before Entry

Check volume relative to average. Unusual volume (1.5x+ average) suggests something is happening. Investigate why before entering.

During the Trade

Monitor volume to gauge conviction. If your long position is rising on increasing volume, that's healthy. Rising on decreasing volume? Consider tightening stops.

At Key Levels

Watch volume at support and resistance. High volume at support that holds = strong demand. High volume at resistance that breaks = strong momentum.

Volume Indicators

• Relative Volume: Today's volume vs. average (Banana Farmer tracks this)

• OBV (On Balance Volume): Cumulative volume indicator showing buying/selling pressure

• VWAP: Volume Weighted Average Price—institutional benchmark

• Volume Profile: Shows volume at each price level

Key Takeaways

• Volume confirms price moves. Big moves on big volume are more significant.

• Always compare to average. "High" volume is relative.

• Watch for divergences. Price up, volume down = potential warning.

• Unusual volume is a signal. Something is happening—investigate.

Developing volume reading skills takes practice. Start paying attention to volume on every chart you look at. Over time, patterns become intuitive.