TA.BOLL

The TA.BOLL() function is used to calculate the Bollinger Band indicator.

The return value of the TA.BOLL() function is a two-dimensional array with the structure: [upLine, midLine, downLine]. array

TA.BOLL(inReal) TA.BOLL(inReal, period, multiplier)

The inReal parameter is used to specify the K-line data. inReal true {@struct/Record Record} structure arrays, numeric arrays The period parameter is used to set the period. period false number The multiplier parameter is used to set the multiplier. multiplier false number

function main() {
    var records = exchange.GetRecords()
    if(records && records.length > 20) {
        var boll = TA.BOLL(records, 20, 2)
        var upLine = boll[0]
        var midLine = boll[1]
        var downLine = boll[2]
        Log(upLine)
        Log(midLine)
        Log(downLine)
    }
}

def main():
    r = exchange.GetRecords()
    if r and len(r) > 20:
        boll = TA.BOLL(r, 20, 2)
        upLine = boll[0]
        midLine = boll[1]
        downLine = boll[2]
        Log(upLine)
        Log(midLine)
        Log(downLine)

void main() {
    auto r = exchange.GetRecords();
    if(r.Valid && r.size() > 20) {
        auto boll = TA.BOLL(r, 20, 2);
        auto upLine = boll[0];
        auto midLine = boll[1];
        auto downLine = boll[2];
        Log(upLine);
        Log(midLine);
        Log(downLine);
    }
}

The default values for the period and multiplier parameters of the TA.BOLL() function are: 20 and 2.

{@fun/TA/TA.MACD TA.MACD}, {@fun/TA/TA.KDJ TA.KDJ}, {@fun/TA/TA.RSI TA.RSI}, {@fun/TA/TA.ATR TA.ATR}, {@fun/TA/TA.OBV TA.OBV}, {@fun/TA/TA.MA TA.MA}, {@fun/TA/TA.EMA TA.EMA}, {@fun/TA/TA.Alligator TA.Alligator}, {@fun/TA/TA.CMF TA.CMF}, {@fun/TA/TA.Highest TA.Highest}, {@fun/TA/TA.Lowest TA.Lowest}

TA.EMA TA.Alligator