stddev
Standard deviation
Reference/Oscillators/Function
stddev(source, length)
Dispersion of source over length bars. Alias: stdev. Default 20. Short form `stddev(20)` uses close.
Parameters
| Name | Type | Description |
|---|---|---|
sourceoptional | series default close | Series to use. Omit it when the first argument is a number — ema(9) means ema(close, 9). |
length | int default 20 | Lookback in bars. Default 20. |
Return value
series
Short form: if the first argument is a number, Dovee uses close as the source.
Also accepted: stdev.
Example
plot stddev(close, 20) as "Stdev"