---
id: "T:cAlgo.API.OptimizationProgressChangedEventArgs"
kind: "record"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationProgressChangedEventArgs/"
---

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

# OptimizationProgressChangedEventArgs (record)

Provides data for the optimization progress changed event.

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.

## Definition

```csharp
public class OptimizationProgressChangedEventArgs
```

Available since cAlgo.API 5.9.

## Examples

C#:

```csharp
protected override void OnStart()
{
    Optimization.ProgressChanged += OnProgressChanged;
}

private void OnProgressChanged(OptimizationProgressChangedEventArgs args)
{
    Print("{0}: {1:F1}%, completed: {2}", args.Operation, args.Progress, args.Process.IsCompleted);
}
```

Python:

```python
def on_start(self):
    api.Optimization.ProgressChanged += self.on_progress_changed

def on_progress_changed(self, args):
    api.Print(f"{args.Operation}: {args.Progress:.1f}%, completed: {args.Process.IsCompleted}")
```

## Constructors

- `public OptimizationProgressChangedEventArgs(OptimizationProgressChangedEventArgs original)` —  [details](https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationProgressChangedEventArgs/Constructor/index.md)

## Properties

- `public string Operation {get;}` — Gets the description of the current operation. [details](https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationProgressChangedEventArgs/Operation/index.md)
- `public OptimizationProcess Process {get;}` — Gets the optimization process that reported progress. [details](https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationProgressChangedEventArgs/Process/index.md)
- `public double Progress {get;}` — Gets the progress percentage of the current operation. [details](https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationProgressChangedEventArgs/Progress/index.md)