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

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

# ChartObjectEventArgs (class)

Provides data for the chart object change event.

Environments: Desktop supported · CLI supported · Cloud supported.

## Definition

```csharp
public abstract class ChartObjectEventArgs
```

## Examples

C#:

```csharp
protected override void OnStart()
{
    Chart.ObjectHoverChanged += OnChartObjectHoverChanged;
}

private void OnChartObjectHoverChanged(ChartObjectHoverChangedEventArgs args)
{
    ChartObjectEventArgs chartObjectArgs = args;
    Print("Object: {0} | Type: {1} | Chart: {2}", chartObjectArgs.ChartObject.Name, chartObjectArgs.ChartObject.ObjectType, chartObjectArgs.Chart.SymbolName);
}
```

Python:

```python
def on_start(self):
    api.Chart.ObjectHoverChanged += self.on_chart_object_hover_changed

def on_chart_object_hover_changed(self, args):
    api.Print(f"Object: {args.ChartObject.Name} | Type: {args.ChartObject.ObjectType} | Chart: {args.Chart.SymbolName}")
```

## Properties

- `public ChartArea Area {get;}` — Gets the chart area. [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ChartObjectEventArgs/Area/index.md)
- `public Chart Chart {get;}` — Gets the chart. [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ChartObjectEventArgs/Chart/index.md)
- `public ChartObject ChartObject {get;}` — Gets the chart object. [details](https://help.ctrader.com/ctrader-algo/references/EventArgs/ChartObjectEventArgs/ChartObject/index.md)