---
id: "T:cAlgo.API.BacktestingTickData"
kind: "class"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Backtesting/DataSource/BacktestingTickData/"
---

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

# BacktestingTickData (class)

Represents a collection of backtesting tick data.

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 BacktestingTickData
```

Available since cAlgo.API 5.3.

## Examples

C#:

```csharp
private void OnDataRequested(BacktestingDataRequest request)
{
    var ticks = MarketData.GetTicks(request.PriceDataSourceId.Symbol.Name);
    var data = ticks.Where(tick => tick.Time >= request.StartTime && tick.Time <= request.EndTime)
        .Select(tick => new BacktestingTick(tick.Time, tick.Bid, tick.Ask));
    request.Complete(new BacktestingTickData(data));
}
```

Python:

```python
from System import Array

def on_data_requested(self, request):
    ticks = api.MarketData.GetTicks(request.PriceDataSourceId.Symbol.Name)
    data = [BacktestingTick(tick.Time, tick.Bid, tick.Ask) for tick in ticks if tick.Time >= request.StartTime and tick.Time <= request.EndTime]
    request.Complete(BacktestingTickData(Array[BacktestingTick](data)))
```

## Constructors

- `public BacktestingTickData(IEnumerable<BacktestingTick> data)` — Creates a new instance of BacktestingTickData with passed data. [details](https://help.ctrader.com/ctrader-algo/references/Plugin/Backtesting/DataSource/BacktestingTickData/Constructor/index.md)