The standard deviation is a measure of how much a dataset differs from its mean; it tells us how dispersed the data are. A dataset that’s pretty much clumped around a single point would have a small standard deviation, while a dataset that’s all over the map would have a large standard deviation. You can. use this calculation for other indicators.
Given a sample...
![USDCHF: Variance (Welford) [Loxx]](https://s3.tradingview.com/n/nGelcFY5_mid.png "Variance (Welford) [Loxx]")
