---
id: "P:cAlgo.API.BacktestingDataRequest.PriceDataSourceId"
kind: "property"
type: "T:cAlgo.API.BacktestingDataRequest"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Backtesting/DataSource/BacktestingDataRequest/PriceDataSourceId/"
---

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

# BacktestingDataRequest.PriceDataSourceId

Member of [BacktestingDataRequest](https://help.ctrader.com/ctrader-algo/references/Plugin/Backtesting/DataSource/BacktestingDataRequest/index.md).

## PriceDataSourceId

Gets request price data source Id (Symbol and TimeFrame).

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
PriceDataSourceId PriceDataSourceId {get;}
```

Python:

```python
backtestingDataRequest.PriceDataSourceId: PriceDataSourceId
```

### Returns

`PriceDataSourceId` — 

Available since cAlgo.API 5.3.

### Examples

C#:

```csharp
private void OnDataRequested(BacktestingDataRequest request)
{
    var symbol = request.PriceDataSourceId.Symbol;
    var timeFrame = request.PriceDataSourceId.TimeFrame;
    Print("Data requested for {0} {1}", symbol.Name, timeFrame);
}
```

Python:

```python
def on_data_requested(self, request):
    symbol = request.PriceDataSourceId.Symbol
    timeFrame = request.PriceDataSourceId.TimeFrame
    api.Print(f"Data requested for {symbol.Name} {timeFrame}")
```