Trade Classes from MT5 for MT4 - library for MetaTrader 4

In this version, there may be some class methods that could not be found   when testing as in need of correction.

The file TradeLibraryMT5Example.mq4 is an example of a simple EA that compiles and runs on both MT5 and MT4.

The following code is used to open pending orders:

CTrade m_trade;

...

res = m_trade.OrderOpen(m_symbol, ORDER_TYPE_BUY_LIMIT , m_lot, lowPrice, lowPrice, 0 , 0 , ORDER_TIME_GTC , 0 );
res = m_trade.OrderOpen(m_symbol, ORDER_TYPE_SELL_LIMIT , m_lot, highPrice, highPrice, 0 , 0 , ORDER_TIME_GTC , 0 );

The function of calculating the total profit of all open market positions can be implemented as follows:

//+------------------------------------------------------------------+
//| Calculate total profit for all market orders                     |
//+------------------------------------------------------------------+
double GetProfit() {
   int total = PositionsTotal();
   double profit = 0;

   CPositionInfo p;

   for(int i = total - 1; i >= 0; i--) {
       if(p.SelectByIndex(i)) {
         ulong magic = p.Magic();
         string symbol = p. Symbol();
         if(magic != m_magicN || symbol != m_symbol) {
             continue ;
         }

         profit += p.Profit() + p.Commission() + p.Swap();
      }
   }

   return profit;
}

The function of closing all open positions and pending orders can be implemented as follows:

//+------------------------------------------------------------------+
//| Attempt to close all pending and market orders                   |
//+------------------------------------------------------------------+
bool TryCloseAll() {
   bool res = true ;
   
   int total;
   double profit = 0;
   ulong ticket;
   ulong magic;
   string symbol;
   
   total = OrdersTotal();

   COrderInfo o;

   for(int i = total - 1; i >= 0; i--) {
       if(o.SelectByIndex(i)) {
         magic = o.Magic();
         symbol = o.Symbol();
         if(magic != m_magicN || symbol != m_symbol) {
             continue ;
         }
         ticket = o.Ticket();

         res &= m_trade.OrderDelete(o.Ticket());
      }
   }

   total = PositionsTotal();
   
   CPositionInfo p;

   for(int i = total - 1; i >= 0; i--) {
       if(p.SelectByIndex(i)) {
         magic = p.Magic();
         symbol = p. Symbol();
         if (magic != m_magicN || symbol != m_symbol) {
             continue ;
         }
         ticket = p.Ticket();

         res &= m_trade.PositionClose(ticket) ;
      }
   }

   return res;
}