SAR in multiple timeframe for Amibroker (AFL)

_SECTION_BEGIN("SAR in multitimeframe");

Plot(C,"",3,64);

A1=SAR(0.02,0.2);
Cond3=Cross(C,A1);
Cond4=Cross(A1,C);
Plot(A1, "sar", colorOrange, 24 );
PlotShapes(Cond3*shapeHollowUpArrow,colorBlue,0,L,-10);
PlotShapes(Cond4*shapeHollowDownArrow,colorBlack,0,H,-10);


TimeFrameSet(inWeekly);
A=SAR(0.02,0.2);
TimeFrameRestore();
K = TimeFrameExpand(A, inWeekly);
Cond1=Cross(C,K);
Cond2=Cross(K,C);
col = IIf(K < L,colorGreen,IIf(K > H,colorRed,colorWhite)); 
Plot(K, "sar H.TR", col, 24 );
PlotShapes(Cond1*shapeUpArrow,colorGreen,0,L,-20);
PlotShapes(Cond2*shapeDownArrow,colorRed,0,H,-20);

Buy=Cond1 AND Cond3;
Sell=Cond2 AND Cond4;
Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
PlotShapes(Buy*shapeUpTriangle,colorGreen,0,L,-35);
PlotShapes(Sell*shapeDownTriangle,colorRed,0,H,-35);
_SECTION_END();