Highly Accurate Buy Sell Trading - Amibroker AFL Code

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_SECTION_BEGIN("B");

Price = (H+L)/2;
MomLength = 10;

PriceMomSum = 0;
FiveMomSum = 0;

FiveMom = abs(Price - Ref(Price, -5));
PriceMom = Price * FiveMom;
for (i=0; i < MomLength; i++) {
 PriceMomSum = PriceMomSum + Ref(PriceMom, -i);
 FiveMomSum = FiveMomSum + Ref(FiveMom, -i);
}
NLEF = PriceMomSum / FiveMomSum;
Buy=  Close  > NLEF;
Sell= Close < NLEF;
Buy=ExRem(Buy,Sell); Sell=ExRem(Sell,Buy); 
PlotShapes( shapeUpArrow* Buy , colorBrightGreen ,0);
PlotShapes( shapeDownArrow* Sell, colorRed ,0);

Plot(Close, "Close", colorWhite, styleThick);
Plot(NLEF, "", IIf(Close>NLEF, colorBrightGreen, colorRed), styleThick);
GraphXSpace = 10;

Filter = Buy OR Sell;
Buy=ExRem(Buy,Sell); Sell=ExRem(Sell,Buy); 
AddTextColumn(FullName(),"Name");
AddColumn( Buy, "BUY" );
AddColumn( Sell, "SELL" );
_SECTION_END();