Debu Market Efficiency Ratio for Amibroker (AFL)

_SECTION_BEGIN("Debu Market Efficiency Ratio");
pds= Param("Periods",8,3,200);
Speed= C - Ref(C, -pds);
Volatility= Sum(abs(C - Ref(C, -1)),pds); 
Efficiency= Speed / Volatility;
MER= EMA(EMA(Efficiency, 5),3);
Plot(MER,"MKt Eff. Ratio",colorRed);
Plot(0,"ZERO LINE",colorBlue);

_SECTION_END();