calcKDJ static method

void calcKDJ(List<KLineEntity> dataList)

Implementation

static void calcKDJ(List<KLineEntity> dataList) {
  var preK = 50.0;
  var preD = 50.0;
  final tmp = dataList.first;
  tmp.k = preK;
  tmp.d = preD;
  tmp.j = 50.0;
  for (int i = 1; i < dataList.length; i++) {
    final entity = dataList[i];
    final n = max(0, i - 8);
    var low = entity.low;
    var high = entity.high;
    for (int j = n; j < i; j++) {
      final t = dataList[j];
      if (t.low < low) {
        low = t.low;
      }
      if (t.high > high) {
        high = t.high;
      }
    }
    final cur = entity.close;
    var rsv = (cur - low) * 100.0 / (high - low);
    rsv = rsv.isNaN ? 0 : rsv;
    final k = (2 * preK + rsv) / 3.0;
    final d = (2 * preD + k) / 3.0;
    final j = 3 * k - 2 * d;
    preK = k;
    preD = d;
    entity.k = k;
    entity.d = d;
    entity.j = j;
  }
}