---
id: "T:cAlgo.API.Indicators.ElderForceIndex"
kind: "interface"
namespace: "cAlgo.API.Indicators"
url: "https://help.ctrader.com/ctrader-algo/references/Indicators/ElderForceIndex/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# ElderForceIndex (interface)

The calculation of the Elder's Force Index.

Environments: Desktop supported · CLI supported · Cloud supported.

## Definition

```csharp
public interface ElderForceIndex
```

## Examples

C#:

```csharp
private ElderForceIndex _elderForceIndex;

protected override void OnStart()
{
    _elderForceIndex = Indicators.ElderForceIndex(13, MovingAverageType.Exponential);
}

protected override void OnBar()
{
    Print("Elder's Force Index: {0}", _elderForceIndex.Result.Last(1));
}
```

Python:

```python
def on_start(self):
    self.elderForceIndex = api.Indicators.ElderForceIndex(13, MovingAverageType.Exponential)

def on_bar(self):
    api.Print(f"Elder's Force Index: {self.elderForceIndex.Result.Last(1)}")
```

## Properties

- `IndicatorDataSeries Result {get;}` — Alexander Elder's force index is a technical indicator that measures the amount of power used to move the price of an asset. [details](https://help.ctrader.com/ctrader-algo/references/Indicators/ElderForceIndex/Result/index.md)

## Inherited members

- `ChartIndicator AddToChart()` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/AddToChart/index.md)
- `Symbol Symbol {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/Symbol/index.md)
- `TimeFrame TimeFrame {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/TimeFrame/index.md)
- `Bars Bars {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/Bars/index.md)