---
id: "P:cAlgo.API.ChartFibonacciArc.Y1"
kind: "property"
type: "T:cAlgo.API.ChartFibonacciArc"
url: "https://help.ctrader.com/ctrader-algo/references/Chart/Drawings/Fibonacci/ChartFibonacciArc/Y1/"
---

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

# ChartFibonacciArc.Y1

Member of [ChartFibonacciArc](https://help.ctrader.com/ctrader-algo/references/Chart/Drawings/Fibonacci/ChartFibonacciArc/index.md).

## Y1

Gets or sets the value 1 on the Y-axis.

Environments: Desktop supported · CLI works differently · Cloud works differently.

- CLI: Created and kept with all its properties, but never drawn: the CLI displays no chart.
- Cloud: Created and kept with all its properties, but never drawn: the cloud displays no chart.

C#:

```csharp
double Y1 {get; set;}
```

Python:

```python
chartFibonacciArc.Y1: float
```

### Returns

`double` — 

Available since cAlgo.API 5.10.

### Examples

C#:

```csharp
var arc = Chart.DrawFibonacciArc("arc", Bars.OpenTimes.Last(30), Bars.LowPrices.Last(30), Bars.OpenTimes.LastValue, Bars.HighPrices.LastValue, Color.Red);
arc.Y1 = Bars.LowPrices.Last(30) - 5 * Symbol.PipSize;
Print("Arc anchor price: {0}", arc.Y1);
```

Python:

```python
arc = api.Chart.DrawFibonacciArc("arc", api.Bars.OpenTimes.Last(30), api.Bars.LowPrices.Last(30), api.Bars.OpenTimes.LastValue, api.Bars.HighPrices.LastValue, Color.Red)
arc.Y1 = api.Bars.LowPrices.Last(30) - 5 * api.Symbol.PipSize
api.Print(f"Arc anchor price: {arc.Y1}")
```