---
id: "M:cAlgo.API.Robot.OnBarClosed"
kind: "method"
type: "T:cAlgo.API.Robot"
url: "https://help.ctrader.com/ctrader-algo/references/General/Robot/OnBarClosed/"
---

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

# Robot.OnBarClosed

Member of [Robot](https://help.ctrader.com/ctrader-algo/references/General/Robot/index.md).

## OnBarClosed()

Called when a new bar is opened; the method is called for the previous (closed) bar.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
protected internal void OnBarClosed()
```

Python:

```python
api.OnBarClosed() -> None
```

### Examples

C#:

```csharp
protected override void OnBarClosed()
{
    var closedBar = Bars.Last(1);
    Print("Bar closed: O={0} H={1} L={2} C={3}", closedBar.Open, closedBar.High, closedBar.Low, closedBar.Close);
}
```

Python:

```python
def on_bar_closed(self):
    closedBar = api.Bars.Last(1)
    api.Print(f"Bar closed: O={closedBar.Open} H={closedBar.High} L={closedBar.Low} C={closedBar.Close}")
```