Live example
Settings and defaults
| Setting | Default | Allowed range |
|---|---|---|
| Length | 20 | 1 to 500 |
| Periods per year | Not set | 1 to 31,622,400 |
What it plots
Drawn in its own pane below the price chart, with its own scale.
| Line | Unit | Drawn as | First value |
|---|---|---|---|
| Value | Percent | Line | after 20 candles |
Calculation notes
- NATR is Wilder ATR divided by the current close, in percent. OHLC methods estimate historical volatility from native time bars; incomplete or invalid windows are unavailable. They use different price-process assumptions and do not measure implied volatility or price-hit probabilities. Blank periods per year means per-bar volatility; an explicit observation schedule annualizes the estimate. Opening gaps are not fully represented.
Questions
What are the default settings of Rogers-Satchell volatility?
The defaults are Length: 20, Periods per year: Not set. You can change every setting on the live chart.
Can I use Rogers-Satchell volatility for free on TraderAI?
Yes. Every indicator in the library can be added to the free live chart. The free plan keeps up to 2 indicators active at the same time; Pro lets you combine more on one chart.
Educational content. Indicators describe past prices; they do not predict future prices and are not investment advice.