---
id: "T:cAlgo.API.Indicators.FractalChaosBands"
kind: "interface"
namespace: "cAlgo.API.Indicators"
url: "https://help.ctrader.com/ctrader-algo/references/Indicators/FractalChaosBands/"
---

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

# FractalChaosBands (interface)

The Fractal Chaos Bands indicator attempts to determine whether or not the market is trending.

Environments: Desktop supported · CLI supported · Cloud supported.

## Definition

```csharp
public interface FractalChaosBands
```

## Remarks

When the market is trending, the bands will have a slope, and if the market is not trending or choppy, the bands will flatten out. The flatter the bands, the stronger the signal that the market is choppy. The more steep the band slopes, the stronger the signal that the market trending or stable.

## Examples

C#:

```csharp
private FractalChaosBands _fractalChaosBands;

protected override void Initialize()
{
    _fractalChaosBands = Indicators.FractalChaosBands();
}
```

Python:

```python
import clr
clr.AddReference("cAlgo.API")

from cAlgo.API import *

class Test():
    def initialize(self):
        self.fractalChaosBands = api.Indicators.FractalChaosBands()
```

C#:

```csharp
using cAlgo.API;
using cAlgo.API.Indicators;

namespace cAlgo.Robots
{
    // This sample cBot shows how to use the Fractal Chaos Bands indicator
    public partial class FractalChaosBandsSample : Robot
    {
        private double _volumeInUnits;

        private FractalChaosBands _fractalChaosBands;

        public Position[] BotPositions
        {
            get
            {
                return Positions.FindAll(Label);
            }
        }

        protected override void OnStart()
        {
            _volumeInUnits = Symbol.QuantityToVolumeInUnits(VolumeInLots);

            _fractalChaosBands = Indicators.FractalChaosBands();
        }

        protected override void OnBar()
        {
            if (Bars.ClosePrices.Last(1) > _fractalChaosBands.High.Last(1) && Bars.ClosePrices.Last(2) <= _fractalChaosBands.High.Last(2))
            {
                ClosePositions(TradeType.Sell);

                ExecuteMarketOrder(TradeType.Buy, SymbolName, _volumeInUnits, Label, StopLossInPips, TakeProfitInPips);
            }
            else if (Bars.ClosePrices.Last(1) < _fractalChaosBands.Low.Last(1) && Bars.ClosePrices.Last(2) >= _fractalChaosBands.Low.Last(2))
            {
                ClosePositions(TradeType.Buy);

                ExecuteMarketOrder(TradeType.Sell, SymbolName, _volumeInUnits, Label, StopLossInPips, TakeProfitInPips);
            }
        }

        private void ClosePositions(TradeType tradeType)
        {
            foreach (var position in BotPositions)
            {
                if (position.TradeType != tradeType) continue;

                ClosePosition(position);
            }
        }
    }
}
```

Python:

```python
import clr

clr.AddReference("cAlgo.API")

# Import cAlgo API types
from cAlgo.API import *

# Import trading wrapper functions
from robot_wrapper import *

class FractalChaosBandsSample():
    def on_start(self):
        self.volumeInUnits = api.Symbol.QuantityToVolumeInUnits(api.VolumeInLots)
        self.fractalChaosBands  = api.Indicators.FractalChaosBands()

    def on_bar_closed(self):
        if api.Bars.ClosePrices.Last(0) > self.fractalChaosBands.High.Last(0) and api.Bars.ClosePrices.Last(1) <= self.fractalChaosBands.High.Last(1):
            self.close_positions(TradeType.Sell)
            api.ExecuteMarketOrder(TradeType.Buy, api.SymbolName, self.volumeInUnits, api.Label, api.StopLossInPips, api.TakeProfitInPips)
        elif api.Bars.ClosePrices.Last(0) < self.fractalChaosBands.Low.Last(0) and api.Bars.ClosePrices.Last(1) >= self.fractalChaosBands.Low.Last(1):
            self.close_positions(TradeType.Buy)
            api.ExecuteMarketOrder(TradeType.Sell, api.SymbolName, self.volumeInUnits, api.Label, api.StopLossInPips, api.TakeProfitInPips)

    def get_bot_positions(self):
        return api.Positions.FindAll(api.Label)

    def close_positions(self, tradeType):
        for position in self.get_bot_positions():
            if position.TradeType != tradeType:
                continue
            api.ClosePosition(position)
```

config.json:

```json
{
  "AccessRights": "None",
  "TimeZone": "UTC",
  "Parameters": [
    {
      "Name": "VolumeInLots",
      "DisplayName": "Volume (Lots)",
      "Type": "Double",
      "DefaultValue": 0.01
    },
    {
      "Name": "StopLossInPips",
      "DisplayName": "Stop Loss (Pips)",
      "Type": "Double",
      "DefaultValue": 10
    },
    {
      "Name": "TakeProfitInPips",
      "DisplayName": "Take Profit (Pips)",
      "Type": "Double",
      "DefaultValue": 10
    },
    {
      "Name": "Label",
      "Type": "String",
      "DefaultValue": "Sample"
    }
  ]
}
```

## Properties

- `IndicatorDataSeries High {get;}` — The high limit of the chaos band. [details](https://help.ctrader.com/ctrader-algo/references/Indicators/FractalChaosBands/High/index.md)
- `IndicatorDataSeries Low {get;}` — The low limit of the chaos band. [details](https://help.ctrader.com/ctrader-algo/references/Indicators/FractalChaosBands/Low/index.md)

## Inherited members

- `ChartIndicator AddToChart()` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/AddToChart/index.md)
- `Symbol Symbol {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/Symbol/index.md)
- `TimeFrame TimeFrame {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/TimeFrame/index.md)
- `Bars Bars {get;}` (from StandardIndicator) [details](https://help.ctrader.com/ctrader-algo/references/General/StandardIndicator/Bars/index.md)