Super TEMA for Amibroker (AFL)

_SECTION_BEGIN("Price");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 
_SECTION_END();
//Super TEMA by Cù Chulainn V1.0

n=25; Av=12; Av1=16; Av2=2; stp=2;

if (Name() == "CPTA.MI")// CAPITALIA
{ n=7; Av=18; Av1=14; Av2=2; }
else if (Name() == "BANI.MI")// BNL
{ n=29; Av=30; Av1=10; Av2=2; }
else if (Name() == "FIBK.MI")// B FIDEURAM
{ n=22; Av=15; Av1=22; Av2=2; }
else if (Name() == "FIA.MI")// FIAT
{ n=2; Av=28; Av1=10; Av2=2; }
else if (Name() == "MDBI.MI")// MEDIOBANCA
{ n=21; Av=27; Av1=29; Av2=2; }
else if (Name() == "MS.MI")// MEDIASET
{ n=30; Av=20; Av1=24; Av2=2; }
else if (Name() == "TIM.MI")// TIM
{ n=6; Av=10; Av1=20; Av2=2; }
else if (Name() == "TLIT.MI")// TELECOM IT
{ n=30; Av=25; Av1=29; Av2=2; }

n = Optimize("Periods",n,2,30,1);
av = Optimize("Average",av,10,30,1);
av1 = Optimize("Average1",av1,10,30,1);
//av2 = Optimize("Average2",av2,2,5,1);
//stp = Optimize("Stop",stp,4,15,1);

Var1= TEMA(Close,n);
Var2= TEMA(var1,av);
Var3= (var1-var2)+var1;
Var1= TEMA(var3,av1);
Var4= MA((var1-var2)+var1,av2);
Var5=(Var1-Var2)+Var1;

//Buy=Cover=Cross(Var5,Var4);
//Sell=Short=Cross(Var4,VAR5);

Buy=Cover=Cross(Var5,Ref(Var5,-1));
Sell=Short=Cross(Ref(Var5,-1),VAR5);

Plot(Var5,"Super TEMA" + "("+WriteVal( n, 1.0 )+","+WriteVal(Av, 1.0 )+"," +WriteVal(Av1, 1.0 )+","+WriteVal(Av2, 1.0 )+")" ,IIf(Var5>Ref(Var5,-1),6,4));

Plot( Flip( Buy, Sell ), "Trade", colorPaleGreen, styleArea | styleOwnScale, 0, 1 );