Technical Studies Reference
- Technical Studies Reference
- Common Study Inputs (Opens a new page)
- Using Studies (Opens a new page)
Dispersion
This study calculates a Dispersion (Variance) over a number of bars specified by the Length Input.
Let \(X\) be a random variable denoting the Input Data, and let \(X_i\) be the value of the Input Data at Index \(i\). Let the Input Length be denoted as \(n\). Then we denote the Variance at Index \(t\) for the given Inputs as \(Var_t(X,n)\), and we compute it in terms of a Simple Moving Average for \(t \geq n - 1\) as follows.
\(\displaystyle{Var_t(X,n) = \frac{1}{n}\sum_{i = t - n + 1}^t (X_i - SMA_t(X,n))^2}\)Inputs
Spreadsheet
The spreadsheet below contains the formulas for this study in Spreadsheet format. Save this Spreadsheet to the Data Files Folder.
Open it through File >> Open Spreadsheet.
*Last modified Monday, 26th September, 2022.