---
id: "E:cAlgo.API.ChartFrame.LinkedChartGroupChanged"
kind: "event"
type: "T:cAlgo.API.ChartFrame"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Chart/ChartFrame/LinkedChartGroupChanged/"
---

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

# ChartFrame.LinkedChartGroupChanged

Member of [ChartFrame](https://help.ctrader.com/ctrader-algo/references/Plugin/Chart/ChartFrame/index.md).

## LinkedChartGroupChanged

Occurs when frame LinkedChartGroup is changed.

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

- CLI: Available to plugins only, and plugins cannot run in the CLI.
- Cloud: Available to plugins only, and plugins cannot run in the cloud.

C#:

```csharp
event Action<ChartFrameLinkedChartGroupChangedEventArgs> LinkedChartGroupChanged;
```

Python:

```python
chartFrame.LinkedChartGroupChanged += handler  # handler(obj: ChartFrameLinkedChartGroupChangedEventArgs)
```

### Returns

`Action<ChartFrameLinkedChartGroupChangedEventArgs>` — 

### Examples

C#:

```csharp
protected override void OnStart()
{
    var chartFrame = ChartManager.AddChartFrame("EURUSD", TimeFrame.Hour);
    chartFrame.LinkedChartGroupChanged += OnLinkedChartGroupChanged;
}

private void OnLinkedChartGroupChanged(ChartFrameLinkedChartGroupChangedEventArgs args)
{
    Print("Chart {0} linked group: {1}", args.ChartFrame.Symbol.Name, args.ChartFrame.LinkedChartGroup);
}
```

Python:

```python
def on_start(self):
    chartFrame = api.ChartManager.AddChartFrame("EURUSD", TimeFrame.Hour)
    chartFrame.LinkedChartGroupChanged += self.on_linked_chart_group_changed

def on_linked_chart_group_changed(self, args):
    api.Print(f"Chart {args.ChartFrame.Symbol.Name} linked group: {args.ChartFrame.LinkedChartGroup}")
```