---
id: "E:cAlgo.API.TradeWatchTab.SizeChanged"
kind: "event"
type: "T:cAlgo.API.TradeWatchTab"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/TradeWatch/TradeWatchTab/SizeChanged/"
---

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

# TradeWatchTab.SizeChanged

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

## SizeChanged

Occurs after tab size (height / width) value change.

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<TradeWatchTabSizeChangedEventArgs> SizeChanged;
```

Python:

```python
tradeWatchTab.SizeChanged += handler  # handler(obj: TradeWatchTabSizeChangedEventArgs)
```

### Returns

`Action<TradeWatchTabSizeChangedEventArgs>` — 

### Examples

C#:

```csharp
protected override void OnStart()
{
    var tab = TradeWatch.AddTab("My Tab");
    tab.SizeChanged += OnTabSizeChanged;
}

private void OnTabSizeChanged(TradeWatchTabSizeChangedEventArgs args)
{
    Print("Tab size changed: {0}x{1}", args.TradeWatchTab.Width, args.TradeWatchTab.Height);
}
```

Python:

```python
def on_start(self):
    tab = api.TradeWatch.AddTab("My Tab")
    tab.SizeChanged += self.on_tab_size_changed

def on_tab_size_changed(self, args):
    api.Print(f"Tab size changed: {args.TradeWatchTab.Width}x{args.TradeWatchTab.Height}")
```