public int rocLookback( int optInTimePeriod )
   {
      if( (int)optInTimePeriod == ( Integer.MIN_VALUE ) )
         optInTimePeriod = 10;
      else if( ((int)optInTimePeriod < 1) || ((int)optInTimePeriod > 100000) )
         return -1;
      return optInTimePeriod;
   }