Why i am getting error in this code? please help

Hi
Can somebody please tell me why am i getting error in this code?

Min1=Low;
Max1=High;

Min2=Min(Low,Ref(Low,-1));
Max2=Max(High,Ref(High,-1));

Min3=Min(Low, Ref(Low,-1));
Max3=Max(Max2,Ref(High, -2));

Delta1 = Max1-Min1;
Delta2 = Max2-Min2;
Delta3 = Max3-Min3;

Odwrocenia = 0.5*(((Delta1*3)+(Delta2*2)+(Delta3))/6);
Plot(Odwrocenia, "Bankier”, colorRed);

The error i am getting:
Ln: 15,Col: 40: Error 31. Syntax error, unexpected $end, expecting')' or ','

THX

Why i am getting error in this code? please help