# Technical Studies Reference

- Technical Studies Reference
- Common Study Inputs (Opens a new page)
- Using Studies (Opens a new page)

### STIX

The STIX (Short Term IndeX) is a short-term trading oscillator that was published in The Polymetric Report. It compares the amount of volume flowing into advancing and declining stocks.

Add this study to a Historical chart for a symbol which indicates the number of advancing issues. Normally this will be the **ADV-NYSE** symbol. For more information, refer to Market Statistics. And add the Add Additional Symbol study to the chart to load data for the declining issues symbol. Normally this will be the **DECL-NYSE** symbol.

Set the **Declining Issues Add Additional Symbol Study** Input to the declining issues **Add Additional Symbol** study.

Let \(N^{(A)}_t\) and \(N^{(D)}_t\) be the Number of Advancing Issues and Number of Declining Issues at Index \(t\). We denote the value of **STIX** at Index \(t\) as \(STIX_t\), and we compute it as follows.

\(\displaystyle{STIX_0 = \left\{ \begin{matrix} 9\cdot\frac{N^{(A)}_t}{N^{(A)}_t + N^{(D)}_t} + 0.91\cdot\left(.9\cdot\frac{N^{(A)}_t}{N^{(A)}_t + N^{(D)}_t}\right) & N^{(A)}_t \neq 0 \space and \space N^{(D)}_t \neq 0 \\ 0 & otherwise \end{matrix}\right .}\)

\(t > 0:\)

\(\displaystyle{STIX_t = \left\{ \begin{matrix} 9\cdot\frac{N^{(A)}_t}{N^{(A)}_t + N^{(D)}_t} + 0.91 \cdot STIX_{t - 1} & N^{(A)}_t \neq 0 \space and \space N^{(D)}_t \neq 0 \\ STIX_{t - 1} & otherwise \end{matrix}\right .}\)

#### Inputs

**Declining Issues Add Additional Symbol Study**: Set this Input to the Declining Issues study which is loading the Declining Issues symbol.

#### 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 Friday, 14th February, 2020.