---
id: "M:cAlgo.API.Internals.IIndicatorsAccessor.PolynomialRegressionChannels(System.Int32,System.Int32,System.Double,System.Double)"
kind: "method"
type: "T:cAlgo.API.Internals.IIndicatorsAccessor"
url: "https://help.ctrader.com/ctrader-algo/references/Indicators/IIndicatorsAccessor/PolynomialRegressionChannels/"
---

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

# IIndicatorsAccessor.PolynomialRegressionChannels

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

## PolynomialRegressionChannels(int degree, int periods, double standardDeviation, double standardDeviation2)

Polynomial Regression Channel (PRC) is an RTX Extension indicator that draws a best fit n-degree polynomial regression line through a recent period of data.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
PolynomialRegressionChannels PolynomialRegressionChannels(int degree, int periods, double standardDeviation, double standardDeviation2)
```

Python:

```python
api.Indicators.PolynomialRegressionChannels(degree: int, periods: int, standardDeviation: float, standardDeviation2: float) -> PolynomialRegressionChannels
```

### Parameters

- `degree` (`int`, Python `int`): The degree of PolynomialRegressionChannels
- `periods` (`int`, Python `int`): The period of PolynomialRegressionChannels
- `standardDeviation` (`double`, Python `float`): The first standardDeviation of PolynomialRegressionChannels
- `standardDeviation2` (`double`, Python `float`): The second standardDeviation of PolynomialRegressionChannels

### Returns

`PolynomialRegressionChannels` — PolynomialRegressionChannels

### Examples

C#:

```csharp
var prc = Indicators.PolynomialRegressionChannels(3, 120, 1.62, 2);
Print("PRC: {0}, upper: {1}, lower: {2}", prc.Prc.LastValue, prc.Sqh.LastValue, prc.Sql.LastValue);
```

Python:

```python
prc = api.Indicators.PolynomialRegressionChannels(3, 120, 1.62, 2)
api.Print(f"PRC: {prc.Prc.LastValue}, upper: {prc.Sqh.LastValue}, lower: {prc.Sql.LastValue}")
```