The difference between paid and free volatility indicators is not price; it is whether a tested claim comes attached. Free built-ins such as Bollinger Bands, Keltner Channels and ATR are well documented and widely used. A paid indicator earns its price only if it adds something the free tools do not, and that something should be checkable.
What can separate them is a stated, published coverage claim, because the free built-ins describe volatility without attaching a measured containment rate.
The measured shortfall of default settings is covered in how accurate Bollinger Bands are: a standard (20, 2) price-space band covered 82.64% of next closes in the paper's comparison, against 94.00% for the outer band here. Past behavior is not a guarantee of future results.
A free indicator does the job whenever its nominal description is all that is needed, such as reading typical bar size with ATR or a squeeze in band width. Nothing here suggests those uses require a paid tool.
Neither proves profit. The paper validates calibration, not the profitability of any use, and whether a use delivers value after costs is an open question. The Behavioral Transform Model also runs narrow at crisis onset, with containment near 65%.
Are TradingView's built-in bands accurate?
They are accurate to their definitions, but their nominal coverage can differ from measured coverage. A (20, 2) Bollinger band covers about 95% only under assumptions that price data do not meet.
Can a free indicator be tested the same way?
Yes. Count how often the next close lands inside the range and compare with the stated rates. Count how often the next close lands inside the range and compare with the stated rate. How to backtest a band indicator shows the steps.
Does paying remove the need to check?
No. The same checks apply to any indicator, as laid out in how to compare band indicators.
The full method is in the working paper. To try the Behavioral Transform Model, use the 30-day free trial: start with the free trial, cancel anytime.
Oisigma provides descriptive market analytics for educational use. It is not investment advice, does not predict prices, and does not provide buy or sell signals. Statistics referenced are historical and were measured in our working paper (not peer-reviewed); past behavior is not a guarantee of future results. Trading and investing involve substantial risk of loss, including the possible loss of all capital invested. Leveraged products (futures, options, margin) carry additional risk and can result in losses that exceed your initial investment. Bollinger Bands® is a registered trademark of John Bollinger; Oisigma is not affiliated with or endorsed by Mr. Bollinger. RiskMetrics® is a registered trademark of MSCI Inc.; Oisigma is not affiliated with or endorsed by MSCI Inc. Nothing in this article is a recommendation to use any particular strategy. Read the full Disclaimer →
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