#### Home >> (Table of Contents) Studies and Indicators >> Technical Studies Reference >> Vertical Horizontal Filter

# Technical Studies Reference

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

### Vertical Horizontal Filter

The Vertical Horizontal Filter determines whether prices are in a trending phase or a congestion phase. Reference: August 1991 issue of Futures magazine, Adam White.

Let \(X\) be a random variable denoting the **Input Data** Input, and let \(X_t\) be the value of the **Input Data** at Index \(t\). Let the **Length** Input be denoted as \(n\).

The **Vertical Horizontal Filter** is denoted as \(VHF_t(X,n)\), and we compute it for \(t \geq n\) as follows.

In the above formula, the functions \(\max\), \(\min\), and \(\mathrm{sum}\) are the Moving Maximum, Moving Minimum, and Moving Summation, respectively.

#### 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, 18th May, 2020.