Opposite Trading - MetaTrader 5 Expert | MT5 EA Download - MetaTrader 5 Resources

Opening a position is the opposite of closing a position and the trading volume is the same. It works with any symbol and any magic number.

For example, we have a BUY 0.01 position in AUDUSD. Once the position is closed (eg we close it manually) the Counter Trade Expert Advisor will immediately open a new AUDUSD position, now a SELL position.

The entire code is contained in the OnTradeTransaction function:

 //+------------------------------------------------------------------+
//| TradeTransaction function |
//+------------------------------------------------------------------+
Blank OnlineTrade ( const MqlTrade transaction & trans,
Constant Mql Transaction Requests & Requirements,
Constant Mql Transaction Result &Result)
  { //--- Get the transaction type as enumeration value ENUM_TRADE_TRANSACTION_TYPE type = trans.type; //--- If the transaction is the result of adding a historical transaction if (type == TRADE_TRANSACTION_DEAL_ADD )
    {
long deal_type =- 1 ;
long deal_entry =- 1 ;
Double volume = 0.0 ;
string deal_symbol = ”” ;
if ( Historical Transaction Select (Transaction))
        {
        deal_type = historical transaction acquisition integer (cross-transaction, transaction type );
        deal_entry = historical transaction acquisition integer (cross-transaction, DEAL_ENTRY );
        Transaction volume = historical transactions get double (cross transaction, transaction volume );
        deal_symbol = historical transaction acquisition string (cross-transaction, DEAL_SYMBOL );
        }
Others return ;
if (transaction entry == DEAL_ENTRY_OUT )
        {
transform (( integer )transactiontype)
          {
Case DEAL_TYPE_BUY :
              m_trade.Buy(deal_volume,deal_symbol);
rest ;
Case Transaction Type_Sell :
              m_trade.Sell(deal_volume,deal_symbol);
rest ;
default :
rest ;
          }
        }
    }
  }

Here we are waiting for the closing transaction (DEAL_ENTRY_OUT). As soon as this trade occurs, we check the trading position (if we closed the buy position, this would be a sell trade and vice versa) and open a new position.

Attachment download

📎opposite_trade.mq5 (6.19 KB)

Source: MQL5 #18904