MQL4: Calculate Profit or Loss on Trade

calcPL.mq4

/**
 * This method calculates the profit or loss of a position in the home currency of the account
 * @param  string  sym  
 * @param  int     type    0 = buy, 1 = sell
 * @param  double  entry
 * @param  double  exit
 * @param  double  lots
 * @result double          profit/loss in home currency
 */
 double calcPL(string sym, int type, double entry, double exit, double lots) {
   var result;
   if ( type == 0 ) {
     result = (exit - entry) * lots * (1 / MarketInfo(sym, MODE_POINT)) * MarketInfo(sym, MODE_TICKVALUE);
   } else if ( type == 1 ) {
     result = (entry - exit) * lots * (1 / MarketInfo(sym, MODE_POINT)) * MarketInfo(sym, MODE_TICKVALUE);
   }
   return ( result );

 }

for someone who likes to be shorter

double calcPL(string sym, int type, double entry, double exit, double lots) {
    double diff = ( type == 0 ) ? (exit - entry) : (entry - exit);
    double result = diff * lots * (1 / MarketInfo(sym, MODE_POINT)) * MarketInfo(sym, MODE_TICKVALUE);

    return NormalizeDouble(result, 2);
 }