public int macdFixLookback( int optInSignalPeriod )
   {
      if( (int)optInSignalPeriod == ( Integer.MIN_VALUE ) )
         optInSignalPeriod = 9;
      else if( ((int)optInSignalPeriod < 1) || ((int)optInSignalPeriod > 100000) )
         return -1;
      return emaLookback ( 26 )
         + emaLookback ( optInSignalPeriod );
   }