IIndicatorsiBollingerBands Method

Function iBollingerBands ( 
	sessionIndex As Integer,
	symbol As String,
	timeframe As TimeFrame,
	price As PriceUsed,
	mode As BollingerBandsMode,
	Optional lookbackPeriods As Integer = 20,
	Optional standardDeviations As Double = 2
) As List(Of Double?)

List<Nullable<double>>^ iBollingerBands(
	int sessionIndex, 
	String^ symbol, 
	TimeFrame timeframe, 
	PriceUsed price, 
	BollingerBandsMode mode, 
	int lookbackPeriods = 20, 
	double standardDeviations = 2
)

abstract iBollingerBands : 
        sessionIndex : int * 
        symbol : string * 
        timeframe : TimeFrame * 
        price : PriceUsed * 
        mode : BollingerBandsMode * 
        ?lookbackPeriods : int * 
        ?standardDeviations : float 
(* Defaults:
        let _lookbackPeriods = defaultArg lookbackPeriods 20
        let _standardDeviations = defaultArg standardDeviations 2
*)
-> List<Nullable<float>>