IIndicatorsAccessor.BollingerBands

method · IIndicatorsAccessor · cAlgo.API.Internals

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The Bollinger Bands indicator shows volatility.

Definition

C#Python

BollingerBands BollingerBands(DataSeries source, int periods, double standardDeviations, MovingAverageType maType)

api.Indicators.BollingerBands(source: DataSeries, periods: int, standardDeviations: float, maType: MovingAverageType) -> BollingerBands

Parameters

Name	C# type	Python type	Description
`source`	`DataSeries`	`DataSeries`	The source data used for calculation.
`periods`	`int`	`int`	The value of the periods used for calculation.
`standardDeviations`	`double`	`float`	The value of the standard deviations used for calculation.
`maType`	`MovingAverageType`	`MovingAverageType`	Type of the Moving Average.

Returns BollingerBands — Bollinger Bands indicator instance

Examples

C#Python

var bollingerBands = Indicators.BollingerBands(Bars.ClosePrices, 20, 2, MovingAverageType.Simple);
if (Symbol.Bid > bollingerBands.Top.LastValue)
    Print("Bid is above the top band {0}", bollingerBands.Top.LastValue);
else if (Symbol.Bid < bollingerBands.Bottom.LastValue)
    Print("Bid is below the bottom band {0}", bollingerBands.Bottom.LastValue);

bollingerBands = api.Indicators.BollingerBands(api.Bars.ClosePrices, 20, 2, MovingAverageType.Simple)
if api.Symbol.Bid > bollingerBands.Top.LastValue:
    api.Print(f"Bid is above the top band {bollingerBands.Top.LastValue}")
elif api.Symbol.Bid < bollingerBands.Bottom.LastValue:
    api.Print(f"Bid is below the bottom band {bollingerBands.Bottom.LastValue}")