Volume Analysis
Quick Definition
The study of trading volume to confirm price trends, identify reversals, and gauge the strength of market moves.
What Is Volume Analysis?
Volume analysis examines the number of shares or contracts traded to understand market conviction and validate price movements.
Volume Basics:
What Volume Tells You:
- Conviction behind price moves
- Potential trend reversals
- Market interest and liquidity
- Confirmation or divergence
Volume Interpretation:
| Price | Volume | Meaning |
|---|---|---|
| Up | High | Strong buying, bullish |
| Up | Low | Weak move, may not sustain |
| Down | High | Strong selling, bearish |
| Down | Low | Weak selling, may reverse |
Key Volume Patterns:
1. Volume Confirmation:
- Rising prices + rising volume = Healthy uptrend
- Falling prices + rising volume = Strong downtrend
- Volume should confirm price direction
2. Volume Divergence:
- Price making new highs + declining volume = Warning
- Suggests weakening momentum, potential reversal
3. Climax Volume:
- Extremely high volume spike
- Often marks trend exhaustion
- Can signal reversal points
4. Volume Dry-Up:
- Very low volume at support/resistance
- May precede breakout
- Indicates consolidation
Volume Indicators:
| Indicator | Use |
|---|---|
| OBV (On-Balance Volume) | Cumulative volume flow |
| Volume SMA | Average volume comparison |
| VWAP | Volume-weighted average price |
| Accumulation/Distribution | Money flow analysis |
Volume Trading Rules:
Breakout Confirmation:
- Valid breakout needs above-average volume
- Low-volume breakouts often fail
Reversal Warning Signs:
- Price continues, volume declines
- High volume on down days in uptrend
- Volume spike at key levels
Support/Resistance:
- High-volume levels become future support/resistance
- Volume Profile shows key price levels
Volume Best Practices:
- Compare to recent average volume (20-50 day)
- Look at volume relative to price action
- Watch for volume spikes at key levels
- Use volume to confirm, not predict
- Different stocks have different volume characteristics
Volume Analysis Example
- 1Breakout on 3x average volume—strong confirmation of move
- 2New highs on declining volume—bearish divergence warning
Related Terms
Support Level
A price level where buying pressure typically overcomes selling pressure, preventing further decline.
Resistance Level
A price level where selling pressure typically overcomes buying pressure, preventing further advance.
Breakout
A price movement where a security moves above a resistance level or below a support level on increased volume, often signaling the start of a new trend.
On-Balance Volume (OBV)
A cumulative volume indicator that adds volume on up days and subtracts volume on down days, designed to show whether volume is flowing into or out of a security.
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