MQL4: Get Last Swing Price

getLastSwingPrice.mq4

/*
 * Get the price of the Stop Loss according to last swing price.
 * @param sym  string   Symbol of currency being analysed
 * @param TF   int      TimeFrame of the currency being analysed
 * @param ord  int      OrderType() = OP_BUYLIMIT, OP_BUYSTOP, OP_SELLLIMIT, OP_SELLSTOP
 * @param entry double  Entry price of the order 
 * @return      double   Last swing point 
 */
double getLastSwingPrice(string sym, int TF, int ord, double entry) {
   int bars = iBars(sym,TF);
   double stop;
   int dir;
   if ( ord == OP_BUYLIMIT || ord == OP_BUYSTOP ) {
      dir = 1;
   } else if ( ord == OP_SELLLIMIT || ord == OP_SELLSTOP ) {
      dir = -1;
   }
   // do NOT use 0 as the current bar is still evolving!
   for ( int i = 1; i < bars; i++ ) {
      if ( dir == -1 && iHigh(sym, xTimeFrame, i) < iHigh(sym, xTimeFrame, i+1) &&
      iHigh(sym, xTimeFrame, i+1) >= iHigh(sym, xTimeFrame, i+2) && 
      iHigh(sym, xTimeFrame, i+1) > entry ) {
         stop = iHigh(sym, xTimeFrame, i+1);
         break;
      }
      if ( dir == 1 && iLow(sym, xTimeFrame, i) > iLow(sym, xTimeFrame, i+1) &&
      iLow(sym, xTimeFrame, i+1) <= iLow(sym, xTimeFrame, i+2) &&
      iLow(sym, xTimeFrame, i+1) < entry ) {
         stop = iLow(sym, xTimeFrame, i+1);
         break;
      }
   }
   return ( stop ); 
}