---
id: "P:cAlgo.API.ChartIndicator.InstanceId"
kind: "property"
type: "T:cAlgo.API.ChartIndicator"
url: "https://help.ctrader.com/ctrader-algo/references/Chart/Indicators/ChartIndicator/InstanceId/"
---

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

# ChartIndicator.InstanceId

Member of [ChartIndicator](https://help.ctrader.com/ctrader-algo/references/Chart/Indicators/ChartIndicator/index.md).

## InstanceId

Gets the ID of a specific indicator instance.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
string InstanceId {get;}
```

Python:

```python
chartIndicator.InstanceId: str
```

### Returns

`string` — 

### Examples

C#:

```csharp
var sma = ChartIndicators.Add("Simple Moving Average", Bars.ClosePrices, 20);
var sameIndicator = ChartIndicators[sma.InstanceId];
Print("Instance id: {0} | Found: {1}", sma.InstanceId, sameIndicator != null);
```

Python:

```python
sma = api.ChartIndicators.Add("Simple Moving Average", api.Bars.ClosePrices, 20)
sameIndicator = api.ChartIndicators[sma.InstanceId]
api.Print(f"Instance id: {sma.InstanceId} | Found: {sameIndicator is not None}")
```