21 day for Amibroker (AFL)

periods = Param( "Periods", 21, 5, 200, 1 );
TRH=Max(Ref(C,-1),H);
TRL=Min(Ref(C,-1),L);
TR=TRH-TRL; 
ADV=V*((C-TRL)-(TRH-C))/ IIf(TR==0,9999999,TR);
WV=V+(Ref(V,-1)*0);
SmV= Wilders(WV,periods);
SmA= Wilders(ADV,periods);

TMF= IIf(SmV==0,0,SmA/SmV);
Plot( TMF, _DEFAULT_NAME(), ParamColor("color", colorCycle ),
ParamStyle("Style") );
_SECTION_END();