calculate method
Calculates the value of this indicator for the given index without caching it.
Returns the result as a T.
Implementation
@override
T calculate(int index) {
final double avgRel = _avgRel.getValue(index).quote;
final double avgDiff = _avgDiff.getValue(index).quote;
final double smi = avgDiff != 0 ? (avgRel / (avgDiff / 2) * 100) : 0;
return createResult(index: index, quote: smi);
}