declare upper;


#===bollingerbands


input price = close;
input displace = 0;
input length = 9;
input Num_Dev_Dn = -2.0;
input Num_Dev_up = 2.0;

def sDev = StDev(data = price[-displace], length = length);

plot MidLine = ExpAverage(data = price[-displace], length = length);
plot LowerBand = MidLine + Num_Dev_Dn * sDev;
plot UpperBand = MidLine + Num_Dev_up * sDev;

LowerBand.SetDefaultColor(Color.white);
LowerBand.SetLineWeight(1);

MidLine.SetDefaultColor(Color.white);
Midline.Setstyle(Curve.short_DASH);
Midline.SetlineWeight(2);

UpperBand.SetDefaultColor(Color.white);
UpperBand.SetLineWeight(1);




#========PPS BUY AND SELL SIGNALS
plot buy = !IsNaN(PPS().”buySignal”);
buy.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);
buy.SetDefaultColor(Color.white);
buy.SetLineWeight(5);
plot sell = !IsNaN(PPS().”SellSignal”);
sell.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
sell.SetDefaultColor(Color.MAGENTA);
sell.SetLineWeight(5);



#=====PPS Trend====
def PPS_trend = if buy then 1 else if sell then 0 else PPS_trend[1];
def PPStrend = PPS_trend;




def cond1 = if PPSTrend==1
          then lowerband
          else double.positive_infinity;
def cond2 = if PPSTrend==0
          then upperband
          else double.negative_infinity;
input showclouds = yes;
AddCloud(if showclouds  then cond1  else double.nan, cond2,  Color.light_GREEN, Color.pink);