---
id: "P:cAlgo.API.OptimizationSettings.DataFile"
kind: "property"
type: "T:cAlgo.API.OptimizationSettings"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationSettings/DataFile/"
---

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

# OptimizationSettings.DataFile

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

## DataFile

Gets the path to the data file used for the optimization.

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
public string DataFile {get; set;}
```

Python:

```python
optimizationSettings.DataFile: str
```

### Returns

`string` — 

Available since cAlgo.API 5.9.

### Examples

C#:

```csharp
var criteria = new[] { new OptimizationCriterion(OptimizationCriterionType.NetProfit, OptimizationCriterionDirection.Maximize) };
var settings = new OptimizationSettings(new DateTime(2025, 1, 1), new DateTime(2025, 3, 1), 10000, criteria)
{
    DataMode = BacktestingDataMode.M1Csv,
    DataFile = @"C:\Data\EURUSD_M1.csv"
};
Print("Optimization data file: {0}", settings.DataFile);
```

Python:

```python
from System import DateTime
criteria = [OptimizationCriterion(OptimizationCriterionType.NetProfit, OptimizationCriterionDirection.Maximize)]
settings = OptimizationSettings(DateTime(2025, 1, 1), DateTime(2025, 3, 1), 10000, criteria)
settings.DataMode = BacktestingDataMode.M1Csv
settings.DataFile = r"C:\Data\EURUSD_M1.csv"
api.Print(f"Optimization data file: {settings.DataFile}")
```