// Downloaded From https://www.WiseStockTrader.com
P = ParamField("Price field",-1);

TrendScore = 
IIf(P>=Ref(P,-11),1,-1) + IIf(P>=Ref(P,-12),1,-1) +
IIf(P>=Ref(P,-13),1,-1) + IIf(P>=Ref(P,-14),1,-1) +
IIf(P>=Ref(P,-15),1,-1) + IIf(P>=Ref(P,-16),1,-1) +
IIf(P>=Ref(P,-17),1,-1) + IIf(P>=Ref(P,-18),1,-1) +
IIf(P>=Ref(P,-19),1,-1) + IIf(P>=Ref(P,-20),1,-1);

Plot(TrendScore,"TrendScore", ParamColor( "Color", colorCycle ), ParamStyle("Style") ); 
PlotGrid(0, colorLightGrey);