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# Exchange

## Definition

Indicates the current exchange of an instrument

## Property Value

Represents the exchange which is selected for the current instrument.

## Syntax

`Instrument.Exchange`

## Examples

```csharp
protected override void OnBarUpdate()
{
    // Print the exchange of the currently configured instrument
    Print(String.Format("Configured instrument is on the {0} exchange", Instrument.Exchange));
}
```

## Additional Access Information

This property can be accessed without a null reference check in the **OnBarUpdate()** event handler. When the **OnBarUpdate()** event is triggered, there will always be an **Instrument** object. Should you wish to access this property elsewhere, check for null reference first. e.g. if (**Instrument** != null)