{ Downloaded From https://www.WiseStockTrader.com }
{Upper BB Hook Down}
UpperBB:= Mov(C,20,S) + (2*(Std(C,20)));
C < UpperBB AND Ref(C,-1) > Ref(UpperBB,-1);

{ Lower BB Hook Up}
LowerBB:= Mov(C,20,S) - (2*(Std(C,20)));
C > LowerBB AND Ref(C,-1) < Ref(LowerBB,-1);