---
id: "M:cAlgo.API.Indicator.Initialize"
kind: "method"
type: "T:cAlgo.API.Indicator"
url: "https://help.ctrader.com/ctrader-algo/references/General/Indicator/Initialize/"
---

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

# Indicator.Initialize

Member of [Indicator](https://help.ctrader.com/ctrader-algo/references/General/Indicator/index.md).

## Initialize()

Custom initialization for the Indicator. This method is invoked when an indicator is launched.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
protected internal void Initialize()
```

Python:

```python
api.Initialize() -> None
```

### Examples

C#:

```csharp
private RelativeStrengthIndex _rsi;

protected override void Initialize()
{
    _rsi = Indicators.RelativeStrengthIndex(Bars.ClosePrices, 14);
}

public override void Calculate(int index)
{
    Print("RSI: {0}", _rsi.Result[index]);
}
```

Python:

```python
def initialize(self):
    self.rsi = api.Indicators.RelativeStrengthIndex(api.Bars.ClosePrices, 14)

def calculate(self, index):
    api.Print(f"RSI: {self.rsi.Result[index]}")
```