calculate method

@override T calculate(int index)

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) {
  if (index + 1 < period) {
    // Starting point of the ZLEMA
    return SMAIndicator<T>(indicator, period).getValue(index);
  }
  if (index == 0) {
    // If the period is bigger than the indicator's value count
    return indicator.getValue(0);
  }

  final double prevZlema = getValue(index - 1).quote;

  return createResult(
    index: index,
    quote: (_k *
            ((2 * indicator.getValue(index).quote) -
                indicator.getValue(index - _lag).quote)) +
        ((1 - _k) * prevZlema),
  );
}