# Technical Studies Reference

- Technical Studies Reference
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- Using Studies (Opens a new page)

# Elder Impulse

This study colors the bars of the Main Price Graph according to the Elder Impulse rules.

Let \(X\) be a random variable denoting the **Input Data** Input. Let the Inputs **Moving Average Length**, **Fast Moving Average Length**, **Slow Moving Average Length**, and **MACD Moving Average Length** be denoted as \(n\), \(n_F\), \(n_S\), and \(n_M\), respectively.

The **Elder Impulse** rules are expressed in terms of the Exponential Moving Average and MACD. See the documentation of those studies for an explanation of the notation used here.

The **Elder Impulse** rules are as follows.

- If \(EMA_t(C,n) > EMA_{t - 1}(C,n)\) and \(\Delta MACD_t(X,n_F,n_S,n_M) > \Delta MACD_{t - 1}(X,n_F,n_S,n_M)\), then the color of the chart bar at Index \(t\) is controlled by the
**Color 2**Input. - If \(EMA_t(C,n) < EMA_{t - 1}(C,n)\) and \(\Delta MACD_t(X,n_F,n_S,n_M) < \Delta MACD_{t - 1}(X,n_F,n_S,n_M)\), then the color of the chart bar at Index \(t\) is controlled by the
**Color 3**Input. - If neither of the two above rules are satisfied, then the color of the chart bar at Index \(t\) is controlled by the
**Color 1**Input.

**Note**: The Exponential Moving Averages in the above rules can be replaced with other moving averages depending on the setting of the **Moving Average Type** Input. The moving average type used in the MACD Difference is controlled by the **MACD Moving Average Type** Input.

#### Inputs

- Input Data
- Moving Average Length
- Fast Moving Average Length
- Slow Moving Average Length
- MACD Moving Average Length
- Moving Average Type
- MACD Moving Average Type
**Color 1**: This Input controls the color of chart bars for which the Moving Average and the MACD Difference neither increase nor decrease together.**Color 2**: This Input controls the color of chart bars for which the Moving Average and the MACD Difference both increase together.**Color 3**: This Input controls the color of chart bars for which the Moving Average and the MACD Difference both decrease together.

#### 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.