Overbought Oversold EMA Crossover - Amibroker AFL Code

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Len_r = Param( "TSI period 'Length':", 25, 1, 100, 1 );
Len_s = Param( "TSI period 'Smoothing':", 13, 1, 100, 1 );
Len_sig = Param( "Signal period:", 7, 1, 100, 1 );
 
cmtm = C - O;
AbscMtm = abs ( cMtm );
Num_T = EMA ( EMA ( cMtm, Len_r ), Len_s );
Den_T = EMA ( EMA ( AbscMtm, Len_r ), Len_s );

TSI = 100 * Nz ( Num_T / Den_T );
Plot( TSI, "CMI("+Len_r+","+Len_s+")", ParamColor( "Color", colorRed ), ParamStyle("Style") );
Plot(EMA(TSI,Len_sig), "", colorLightBlue);
PlotGrid(0, colorLightGrey);
PlotGrid(25, colorLightGrey);
PlotGrid(-25, colorLightGrey);