standardDeviation property
Standard deviation value of the bollinger band.
Defaults to 2.
Widget build(BuildContext context) {
 return SfCartesianChart(
   indicators: <TechnicalIndicator<Sample, num>>[
     BollingerBandIndicator<Sample, num>(
       period: 2,
       standardDeviation: 3
     ),
   ],
 );
}
Implementation
final int standardDeviation;