public override bool IsAlertConditionTrue(AlertConditionItem conditionItem, Condition condition, ChartAlertValue[] values,
ChartControl chartControl, ChartScale chartScale)
{
double minPrice = Anchors.Min(a => a.Price);
double maxPrice = Anchors.Max(a => a.Price);
DateTime minTime = Anchors.Min(a => a.Time);
DateTime maxTime = Anchors.Max(a => a.Time);
// note, time region higlight x will always be a cross from moving linearly. until someone builds a time machine anyway
// no need for lookback/cross check so just check first (most recent) value
if (Mode == RegionHighlightMode.Time)
{
DateTime vt = values[0].Time;
return(condition == Condition.CrossInside ? vt > minTime && vt <= maxTime : vt > minTime && vt < maxTime);
}
Predicate <ChartAlertValue> predicate = v =>
{
bool isInside = Mode == RegionHighlightMode.Time ? v.Time >= minTime && v.Time <= maxTime : v.Value >= minPrice && v.Value <= maxPrice;
return(condition == Condition.CrossInside ? isInside : !isInside);
};
return(MathHelper.DidPredicateCross(values, predicate));
}