52 Week Low Price Surge 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() ); 

per_1=20*(Ref(LLV(Low,260),-1))/100;

HI = Close > Ref(HHV(High,260),-1);
LW = Close < Ref(LLV(Low,260),-1);

//Filter = (HI OR LW)AND (C>30 AND C<1000 );
Filter = (C>(LW+per_1))AND (C>30 AND C<1000 );

AddColumn( High > Ref(HHV(High,260),-1), "52 Week High", 1 );
AddColumn( Low < Ref(LLV(Low,260),-1), "52 Week Low", 1 );
AddColumn( C, "Close", 1.2 );

_SECTION_END();