---
id: "T:cAlgo.API.ChartIndicatorEventArgs"
kind: "class"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/EventArgs/ChartIndicatorEventArgs/"
---

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

# ChartIndicatorEventArgs (class)

The base class representing event args for a `ChartIndicator`.

Environments: Desktop supported · CLI supported · Cloud not supported.

- Cloud: Never raised in the cloud: the ChartIndicators events never fire there.

## Definition

```csharp
public abstract class ChartIndicatorEventArgs
```

## Examples

C#:

```csharp
protected override void OnStart()
{
    Chart.Indicators.IndicatorAdded += OnChartIndicatorEvent;
    Chart.Indicators.IndicatorModified += OnChartIndicatorEvent;
    Chart.Indicators.IndicatorRemoved += OnChartIndicatorEvent;
}

private void OnChartIndicatorEvent(ChartIndicatorEventArgs args)
{
    Print("{0}: {1}", args.GetType().Name, args.Indicator.Name);
}
```

Python:

```python
def on_start(self):
    api.Chart.Indicators.IndicatorAdded += self.on_chart_indicator_event
    api.Chart.Indicators.IndicatorModified += self.on_chart_indicator_event
    api.Chart.Indicators.IndicatorRemoved += self.on_chart_indicator_event

def on_chart_indicator_event(self, args):
    api.Print(f"{type(args).__name__}: {args.Indicator.Name}")
```

## Properties

- `public ChartIndicator Indicator {get;}` — Gets the ChartIndicator that raised an event. [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ChartIndicatorEventArgs/Indicator/index.md)