---
id: "M:cAlgo.API.CustomSymbol.AddBars(cAlgo.API.TimeFrame)"
kind: "method"
type: "T:cAlgo.API.CustomSymbol"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Symbol/Custom/CustomSymbol/AddBars/"
---

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

# CustomSymbol.AddBars

Member of [CustomSymbol](https://help.ctrader.com/ctrader-algo/references/Plugin/Symbol/Custom/CustomSymbol/index.md).

## AddBars(TimeFrame timeFrame)

Adds bars for a time frame that will be used for this custom symbol.

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
CustomBars AddBars(TimeFrame timeFrame)
```

Python:

```python
customSymbol.AddBars(timeFrame: TimeFrame) -> CustomBars
```

### Parameters

- `timeFrame` (`TimeFrame`, Python `TimeFrame`): Bars TimeFrame, it must be a built-in time frame not custom.

### Returns

`CustomBars` — CustomBars

Available since cAlgo.API 5.3.

### Examples

C#:

```csharp
var customSymbol = CustomSymbols.Add("MYEURUSD", Symbols.GetSymbol("EURUSD"));
var customBars = customSymbol.AddBars(TimeFrame.Hour);
var sourceBars = MarketData.GetBars(TimeFrame.Hour, "EURUSD");
customBars.AppendBars(sourceBars.Select(bar => new CustomBar(bar.OpenTime, bar.Open, bar.High, bar.Low, bar.Close, (long)bar.TickVolume)));
```

Python:

```python
customSymbol = api.CustomSymbols.Add("MYEURUSD", api.Symbols.GetSymbol("EURUSD"))
customBars = customSymbol.AddBars(TimeFrame.Hour)
for bar in api.MarketData.GetBars(TimeFrame.Hour, "EURUSD"):
    customBars.AppendBar(CustomBar(bar.OpenTime, bar.Open, bar.High, bar.Low, bar.Close, int(bar.TickVolume)))
```