Bollinger Bandwidth

Plain-language meaning

Bollinger Bandwidth expresses the distance between the upper and lower bands as a percentage of the middle band.

Why it is useful

Bollinger Bandwidth is useful as descriptive evidence when it is compared on the same definition, source, period, unit and exact listing. It is one input to research, not a verdict.

Where it appears in XMarketRadar

Look for Bollinger Bandwidth in Advanced Chart settings, indicator panels, screeners and technical research for the selected listing and bar interval.

How it is calculated or sourced

Calculate bandwidth % = (upper band − lower band) / middle band × 100. It is unavailable if the required window is incomplete or the middle band cannot be used as a denominator.

Inputs, period and unit

Read the disclosed inputs or source, observation period, bar interval, unit, native currency and scale. A value without its source and as-of context is incomplete; unlike units must not be combined.

Worked example

Illustrative only: With lower ₹92, upper ₹108 and middle ₹100, bandwidth is (108−92)/100×100 = 16%. If the bands later narrow to ₹96 and ₹104 around ₹100, bandwidth becomes 8%.

What high and low mean

A higher or lower Bollinger Bandwidth value is descriptive, not automatically good or bad. Meaning depends on the instrument, comparison period, method and related evidence.

Positive, negative and genuine zero

Positive and negative Bollinger Bandwidth values retain the definition shown here. A genuine reported or computed zero is displayed as 0 and is not the same as missing evidence.

When it is unavailable

Unavailable (—) means Bollinger Bandwidth is absent, unsupported, stale under the screen's rules or not computable from verified inputs. It must never be converted to zero or a neutral signal.

Limitations and common mistakes

Settings, warm-up history, adjusted-price basis and smoothing convention materially change results. Do not compare differently configured indicators as if identical. Partial bars and corporate-action discontinuities can create misleading moves.

Market-specific differences

The concept is used across all supported markets, but currency, price scale, session calendar, source field and regulatory definition can differ. XMarketRadar preserves the exact exchange context.

Related terms

Use the related-term links on this page to compare Bollinger Bandwidth with neighbouring definitions while retaining each term's distinct source, unit and limitations.

Suggested next steps

Open the related Technical analysis terms below, then follow the matching Help Centre task guide and inspect Bollinger Bandwidth on an exact exchange listing. Confirm source, as-of time, units and unavailable reason before using it in research.

Educational information only; not investment advice or an order service.

This Bollinger Bandwidth tutorial is educational and descriptive. It is not investment advice, a price prediction, a recommendation, or an instruction to buy, sell, rebalance or place an order.