RSI Relative Performance - Amibroker AFL Code

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_SECTION_BEGIN("Relative Performance");
_N( TickerList = ParamStr("Tickers", "^DJI,MSFT,GE") );
NumBars = 20;
fvb = Status("firstvisiblebar");
Plot( 100 * ( C - C[ fvb ] ) / C[ fvb ], Name(), colorBlue );
for( i = 0; ( symbol = StrExtract( TickerList, i ) ) != ""; i++ )
{
 fc = Foreign( symbol, "C" );

 if( ! IsNull( fc[ 0 ] ) )
 {
   Plot( 100 * ( fc - fc[ fvb ] )/ fc[ fvb ], symbol, colorLightOrange + ( (2*i) % 15 ), styleLine );
 }
}
PlotGrid( 0, colorYellow );
_N( Title = "{{NAME}} - Relative Performance [%]: {{VALUES}}" );

if( Status("action") == actionCommentary )
{
 Change = SelectedValue( ROC( C, NumBars ) );
 printf( "Over last %g bars ", NumBars );
 printf( Name() + " has moved %.2g%%\n", Change );

 printf("\nIn the same time\n");
 for( i = 0; ( symbol = StrExtract( TickerList, i ) ) != ""; i++ )
 {
  fc = Foreign( symbol, "C" );
 
  if( ! IsNull( fc[ 0 ] ) )
  {
  fChange = SelectedValue( ROC( fc, NumBars ) );
   printf( symbol + " performance was %.2g%%", fChange, fChange - Change );
  if( fChange - Change > 0 )
     { 
        printf( " better " );
  }
  else 
  {
   printf( " worse " ); 
     }
     printf( "than " + Name() + "\n");
   }
 }
}
_SECTION_END();