---
id: "M:cAlgo.API.OptimizationMultiSymbolParameter.#ctor(System.String,System.Collections.Generic.IReadOnlyList{cAlgo.API.Internals.Symbol})"
kind: "constructor"
type: "T:cAlgo.API.OptimizationMultiSymbolParameter"
url: "https://help.ctrader.com/ctrader-algo/references/Plugin/Optimization/OptimizationMultiSymbolParameter/Constructor/"
---

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

# OptimizationMultiSymbolParameter constructor

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

## OptimizationMultiSymbolParameter(string name, IReadOnlyList<Symbol> value)

Holds the parameter fixed at the given value.

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 OptimizationMultiSymbolParameter(string name, IReadOnlyList<Symbol> value)
```

Python:

```python
OptimizationMultiSymbolParameter(name: str, value: Sequence[Symbol])
```

### Parameters

- `name` (`string`, Python `str`): The cBot parameter name.
- `value` (`IReadOnlyList<Symbol>`, Python `Sequence[Symbol]`): The fixed set of symbols.

Available since cAlgo.API 5.9.

### Examples

C#:

```csharp
var parameter = new OptimizationMultiSymbolParameter("Basket", Symbols.GetSymbols("EURUSD", "GBPUSD"));
Print("{0} optimized: {1}", parameter.Name, parameter.IsOptimized);
```

Python:

```python
parameter = OptimizationMultiSymbolParameter("Basket", api.Symbols.GetSymbols("EURUSD", "GBPUSD"))
api.Print(f"{parameter.Name} optimized: {parameter.IsOptimized}")
```

## OptimizationMultiSymbolParameter(OptimizationMultiSymbolParameter original)



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 OptimizationMultiSymbolParameter(OptimizationMultiSymbolParameter original)
```

Python:

```python
OptimizationMultiSymbolParameter(original: OptimizationMultiSymbolParameter)
```

### Parameters

- `original` (`OptimizationMultiSymbolParameter`, Python `OptimizationMultiSymbolParameter`):

Available since cAlgo.API 5.9.