---
id: "P:cAlgo.API.CustomSymbol.LotSize"
kind: "property"
type: "T:cAlgo.API.CustomSymbol"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Symbol/Custom/CustomSymbol/LotSize/"
---

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

# CustomSymbol.LotSize

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

## LotSize

Gets / sets the lot size.

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
long LotSize {get; set;}
```

Python:

```python
customSymbol.LotSize: int
```

### Returns

`long` — 

Available since cAlgo.API 5.3.

### Examples

C#:

```csharp
var customSymbol = CustomSymbols.Add("MYEURUSD", Symbols.GetSymbol("EURUSD"));
customSymbol.LotSize = 100000;
Print("Lot size: {0}", customSymbol.LotSize);
```

Python:

```python
customSymbol = api.CustomSymbols.Add("MYEURUSD", api.Symbols.GetSymbol("EURUSD"))
customSymbol.LotSize = 100000
api.Print(f"Lot size: {customSymbol.LotSize}")
```