Syntax

talib.BBANDS

Calculates the Bollinger Bands and returns the upper band, middle band and lower band.


    
    
    
talib.BBANDS(inReal)


    
    
    
talib.BBANDS(inReal, optInTimePeriod)


    
    
    
talib.BBANDS(inReal, optInTimePeriod, optInNbDevUp)


    
    
    
talib.BBANDS(inReal, optInTimePeriod, optInNbDevUp, optInNbDevDn)


    
    
    
talib.BBANDS(inReal, optInTimePeriod, optInNbDevUp, optInNbDevDn, optInMAType)

Examples

Compute the Bollinger Bands from the latest K-lines.

javascript
python


    javascript
    
    
function main() {
    var records = exchange.GetRecords()
    if (!records) return
    var ret = talib.BBANDS(records)
    // Output: [upper band array, middle band array, lower band array]
    Log(ret)
}


    python
    
    
import talib
def main():
    records = exchange.GetRecords()
    if not records:
        return
    ret = talib.BBANDS(records.Close)
    # Output: (upper band array, middle band array, lower band array)
    Log(ret)

Returns

Type	Description
array	Two-dimensional array: [upper band array, middle band array, lower band array] (a tuple in the same order in Python).

Arguments

Name	Type	Required	Description
inReal	`Record` array / numeric array	Yes	K-line array (close prices are used) or numeric array; in Python, pass a numeric array such as `records.Close`.
optInTimePeriod	number	No	Calculation period. Default `5`.
optInNbDevUp	number	No	Standard deviation multiplier for the upper band. Default `2`.
optInNbDevDn	number	No	Standard deviation multiplier for the lower band. Default `2`.
optInMAType	number	No	Moving average type; see the MAType table on the `Talib` page. Default `0` (SMA).