Fractal Price with TSF for Amibroker (AFL)

_SECTION_BEGIN("Background_Setting");
SetChartBkGradientFill( ParamColor("BgTop", colorBlack),
ParamColor("BgBottom", colorBlack),ParamColor("titleblock",colorDarkTeal )); 
_SECTION_END();

_SECTION_BEGIN("Price Fractal");

Plot( C, "Close", ParamColor("Color", colorGreen ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 


_SECTION_END ();


_SECTION_BEGIN("Fractal");
UpFractal= ValueWhen(
 (Ref(H,-2) >= Ref(H, -3)) AND
 (Ref(H,-2) >= Ref(H, -1)) AND
 (Ref(H,-2) >= H), Ref(H,-2));

DownFractal= ValueWhen(
 (Ref(L,-3) <= Ref(L, -4)) AND
 (Ref(L,-3) <=  Ref(L, -2)) AND
 (Ref(L,-3) <=  Ref(L, -1)) AND
 (Ref(L,-3) <=  L), Ref(L,-3));

//tick
tick=IIf( C<=200,1,
     IIf(C>=200 AND C<=500,5,
     IIf(C>=500 AND C<=2000,10,
     IIf(C>=2000 AND C<=5000,25,
     IIf(C>5000,50,0))) ));

Plot(Ref(UpFractal, 2), "Up Fractal", ParamColor("resistance",colorBlue), ParamStyle("Up Fractal Style", styleLine|styleNoTitle));
Plot(Ref(DownFractaL,3), "Down Fractal",ParamColor("suport",colorRed), ParamStyle("Down Fractal Style", styleLine|styleNoTitle));


SetChartOptions( 0,chartShowArrows|chartShowDates );

Title = 
EncodeColor( colorGrey50) +
Name()+ "   "+Date()+
"   O " + "= "+O+
"   H "+"= "+H+
"   L "+"= "+L+
"   C "+"= "+C+
"   Change "+"= "+ WriteVal(ROC( C,1),1.2) + "  %  ";

_SECTION_END( );

_SECTION_BEGIN ("Time Series");
Ts = Param("Length",5, 2, 100, 1);

TSFtrend = TSF (Close, Ts);

//SetChartOptions(1,chartShowArrows | chartShowDates);

Plot( TSFtrend, "Time Series Forecast", colorYellow, styleLine, Null, Null, 0, 2);

TSFdir = LastValue (ROC (TSFtrend, 2, 0));

//WriteVal(TSFtrend,1.20);
printf("TSF ROC = " + WriteVal( ROC(TSFtrend,2,0), 1.2));

_N(Title = Title + WriteIf(TSFdir > 0, EncodeColor (colorAqua), EncodeColor(colorOrange)) 
		+ "\n\nTime Series Forcast ROC= " + WriteVal ( TSFdir, 1.2));

_SECTION_END ();