{ Downloaded From https://www.WiseStockTrader.com }
{Upper Band}
Prd1:=Input("ATR Period",1,20,5);
Prd2:=Input("Period for Highest High Value",1,20,10);
(HHV(LLV(L,Prd1)+ATR(Prd1),Prd2));

{Lower Band}
Prd2:=Input("Period for Lowest Low Value",1,20,10);
(LLV(HHV(H,Prd1)-ATR(Prd1),Prd2))