How to show a 15% pullback from High of day Price?

It would have been very good if y0u had included an example that I could use for testing. Very tough to find stocks that match this pattern.

Here is the code I believe will work as requested. I have no idea whether it does.

input percentGain = 60.0;
input percentRetrace = 15.0;
plot priorDayClose = close(period = AggregationPeriod.DAY)[1];
priorDayClose.SetDefaultColor(Color.GRAY);
priorDayClose.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
def newDay = GetDay() <> GetDay()[1];
rec trackHighOfDay = if newDay then high else if high > trackHighOfDay[1] then high else trackHighOfDay[1];
plot highOfDay = trackHighOfDay;
highOfDay.SetDefaultColor(Color.CYAN);
highOfDay.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
def gain = 100 * (high / priorDayClose - 1);
def retrace = 100 * (close / highOfDay - 1);
rec hasRetraced = if newDay then 0 else if gain > percentGain and retrace < -percentRetrace then 1 else hasRetraced[1]; def signal = hasRetraced and !hasRetraced[1]; AddChartBubble(signal, low, Concat(percentRetrace, "% Pullback"), Color.RED, no);