Bollinger Band Width Node
BBW - Volatility Expansion/Compression
Overview
Bollinger Band Width measures the distance between the upper and lower Bollinger Bands normalized by the middle band (SMA). It quantifies how "wide" or "narrow" the bands are, indicating whether the market is experiencing volatility expansion or compression.
Low BBW values indicate a volatility squeeze—bands are tight, suggesting consolidation and potential for a breakout. High BBW values indicate volatility expansion—bands are wide, often accompanying strong trending moves or breakouts.
BBW is particularly useful for timing entries by identifying periods of low volatility before expansion occurs, and for recognizing when expansions are exhausting after periods of high volatility.
Formula
Bollinger Band Width measures the normalized distance between bands:
Parameters
| Parameter | Type | Default | Description |
|---|---|---|---|
| period | number | 20 | Lookback period for Bollinger Bands calculation |
💡 Tip: Very low BBW values (below historical average) often precede significant breakouts.
Common Use Cases
1. Squeeze Identification
When BBW reaches its lowest level in 100+ bars, a "squeeze" has occurred. This often precedes explosive moves.
2. Volatility Expansion
Rising BBW indicates expanding volatility, often confirming breakouts or trend strength.
3. Entry Timing
Enter trend-following trades when BBW starts rising from low levels, signaling volatility awakening.
4. Breakout Prediction
Low BBW combined with price near moving average suggests conditions are ripe for breakout signals.
Popular Period Settings
| Period | Timeframe | Use Case |
|---|---|---|
| 10 | Short-term | Fast squeeze detection, intraday |
| 20 | Medium-term | Standard swing trading (default) |
| 50 | Long-term | Position trading, major moves |
Advantages & Limitations
Advantages
- •Identifies volatility squeezes before breakouts
- •Simple normalized measurement
- •Useful for filtering trading signals
- •Comparable across different securities
Limitations
- •Lagging indicator, reacts to volatility changes slowly
- •Squeeze doesn't always precede immediate breakout
- •Requires trend confirmation
- •False squeezees can occur
Tips & Best Practices
📊 Historical Context
Compare current BBW to historical levels. A squeeze is only significant relative to past values.
⚡ Combine with Volume
Low BBW with rising volume suggests strong potential breakout when volatility expands.
💰 Wait for Expansion
Don't trade on squeeze alone. Wait for BBW to rise and price to close outside bands for confirmation.
⚠️ Avoid Trading Mid-Squeeze
When BBW is at extremes (very low), expect poor risk-reward. Wait for expansion confirmation.
Example Strategy
Here's a Bollinger Band Squeeze strategy:
1. Identify Squeeze
When BBW drops to its lowest level in the past 100+ bars, a squeeze is occurring. Price is consolidating.
2. Wait for Expansion
Watch for BBW to begin rising. This indicates volatility is awakening and a breakout is likely coming.
3. Confirm Breakout Direction
When price breaks outside bands, enter in that direction. Long breakout = trend up, short breakout = trend down.
4. Profit Target
Target until BBW begins contracting again or price stalls near upper/lower band extreme areas.
Related Indicators
Bollinger Bands
The foundation indicator from which BBW is derived.
Bollinger %B
Shows price location within bands; complements BBW.
StdDev
The underlying volatility measure in band width.
ATRBands
Similar concept using ATR for volatility measurement.