priceAboveToProb function

double priceAboveToProb(
  1. KLineEntity c,
  2. double? ref, {
  3. double pct = 0.005,
})

价差归一： (close - ref) / (k * close)，k=0.5%默认

Implementation

double priceAboveToProb(KLineEntity c, double? ref, {double pct = 0.005}) {
  if (!isF(ref)) return 0.5;
  final base = (c.close - ref!) / (math.max(1e-9, c.close * pct));
  return clamp01((base.clamp(-1, 1) + 1) / 2);
}