Bollinger Band Scans

Detect overbought/oversold extremes, volatility squeeze setups and band-walk momentum using %B and Bandwidth.

Live data

Signal Key: Overbought — price ≥ Upper Band Oversold — price ≤ Lower Band Squeeze — bandwidth near 20-day low Upper Walk — %B ≥ 80 (momentum) Lower Walk — %B ≤ 20 (weakness)

Overbought

Oversold

Squeeze ⚡

Upper Walk ▲

Lower Walk ▼

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#	Symbol	LTP	Chg %	Upper	Middle	Lower	%B Position	Bandwidth	RSI	Volume	Signal
1	ICICIPRULITOP	431.0	+0.6%	474.97	440.01	405.06	37.1%	15.89%	18.16	0	— Normal
2	ICICIGITOP	1574.0	+0.07%	1721.59	1626.23	1530.87	22.61%	11.73%	24.95	0	— Normal
3	HDFCLIFETOP	517.0	+0.56%	567.11	537.45	507.8	15.51%	11.04%	29.89	17.77L	▼ Lower Walk
4	SBILIFETOP	1652.0	-0.88%	1735.71	1672.83	1609.95	33.44%	7.52%	42.65	14.93L	— Normal

#	Symbol	LTP	Chg %	Upper	Middle	Lower	%B Position	Bandwidth	RSI	Volume	Signal
1	HDFCLIFETOP	517.0	+0.56%	567.11	537.45	507.8	15.51%	11.04%	29.89	17.77L	▼ Lower Walk

#	Symbol	LTP	Chg %	Upper	Middle	Lower	%B Position	Bandwidth	RSI	Volume	Signal
1	ICICIPRULITOP	431.0	+0.6%	474.97	440.01	405.06	37.1%	15.89%	18.16	0	— Normal
2	ICICIGITOP	1574.0	+0.07%	1721.59	1626.23	1530.87	22.61%	11.73%	24.95	0	— Normal
3	SBILIFETOP	1652.0	-0.88%	1735.71	1672.83	1609.95	33.44%	7.52%	42.65	14.93L	— Normal

Based on 20-period Bollinger Bands (2σ) on daily candles. Squeeze = bandwidth near 20-session low. · Auto-refresh every 60s during market hours

What Are Bollinger Bands?

Bollinger Bands is a popular technical indicator developed by analyst John Bollinger in the 1980s. It consists of three lines plotted around a simple moving average to measure market volatility and identify overbought or oversold conditions.

Upper Band: 20-day SMA + (20-day standard deviation of price × 2)
Middle Band: 20-day Simple Moving Average (SMA)
Lower Band: 20-day SMA − (20-day standard deviation of price × 2)

When the bands widen, volatility is increasing — more trading opportunities. When bands narrow (squeeze), volatility is low and a breakout is likely approaching.

How to Use Bollinger Bands in Trading

Price near Lower Band: Potential buying opportunity if the band holds; breakdown signal if price breaks below.
Price near Upper Band: Potential selling opportunity if the band holds; breakout signal if price breaks above.
Bollinger Squeeze: Bands narrow — anticipate a high-momentum breakout or breakdown.
Upper Band Walk: Price consistently touches the upper band — strong uptrend in progress.
Lower Band Walk: Price consistently touches the lower band — strong downtrend in progress.
%B above 1.0: Price is above the upper band — overbought; watch for reversal.
%B below 0.0: Price is below the lower band — oversold; watch for bounce.

Bollinger Band Formulas

Upper Band = 20-day SMA + (20-day std dev × 2)
Middle Band = 20-day SMA
Lower Band = 20-day SMA − (20-day std dev × 2)
%B = (Price − Lower Band) / (Upper Band − Lower Band)
Bandwidth = (Upper Band − Lower Band) / Middle Band

Related Tools

What Are Bollinger Bands?

Upper Band: 20-day SMA + (20-day standard deviation of price × 2)
Middle Band: 20-day Simple Moving Average (SMA)
Lower Band: 20-day SMA − (20-day standard deviation of price × 2)

When the bands widen, volatility is increasing — more trading opportunities. When bands narrow (squeeze), volatility is low and a breakout is likely approaching.

How to Use Bollinger Bands in Trading

Price near Lower Band: Potential buying opportunity if the band holds; breakdown signal if price breaks below.
Price near Upper Band: Potential selling opportunity if the band holds; breakout signal if price breaks above.
Bollinger Squeeze: Bands narrow — anticipate a high-momentum breakout or breakdown.
Upper Band Walk: Price consistently touches the upper band — strong uptrend in progress.
Lower Band Walk: Price consistently touches the lower band — strong downtrend in progress.
%B above 1.0: Price is above the upper band — overbought; watch for reversal.
%B below 0.0: Price is below the lower band — oversold; watch for bounce.

Bollinger Band Formulas

Upper Band = 20-day SMA + (20-day std dev × 2)
Middle Band = 20-day SMA
Lower Band = 20-day SMA − (20-day std dev × 2)
%B = (Price − Lower Band) / (Upper Band − Lower Band)
Bandwidth = (Upper Band − Lower Band) / Middle Band