1. void OnTick()
2. {
3.     static int last_total_positions = -1; // The last total number of open positions
4.     static MqlTradeRequest last_request = {0}; // The last trade request made
5.     static MqlTradeResult last_result = {0}; // The last trade result received
6.  
7.     // Retrieve the total number of open positions
8.     int total_positions = PositionsTotal();
9.  
10.     // Check if there are any open positions
11.     if (total_positions > 0)
12.     {
13.         // Check if the total number of open positions has changed
14.         if (total_positions != last_total_positions)
15.         {
16.             // Print the new total number of open positions in the Experts log
17.             Print("Total open positions: ", total_positions);
18.  
19.             // Update the last total number of open positions received
20.             last_total_positions = total_positions;
21.         }
22.  
23.         // Loop through all open positions
24.         for (int i = 0; i < total_positions; i++)
25.         {
26.             // Get the ticket number for the current position
27.             ulong ticket = PositionGetTicket(i);
28.  
29.             // Check if we already made a request for this position
30.             if (last_request.action == TRADE_ACTION_DEAL && last_request.order == ticket)
31.             {
32.                 // Check if we received a result for the previous request
33.                 if (last_result.retcode == TRADE_RETCODE_DONE)
34.                 {
35.                     // Get the P/L for the current position from the trade result
36.                     double profit = last_result.profit;
37.  
38.                     // Convert the P/L to a string
39.                     string profit_str = DoubleToString(profit, Digits);
40.  
41.                     // Create the JSON payload for the WebSocket server
42.                     string payload = "{"ticket": " + IntegerToString(ticket) + ", "profit": " + profit_str + "}";
43.  
44.                     // Send the P/L to the WebSocket server
45.                     WebRequest(websocket_handle, "SEND", payload, "", "");
46.  
47.                     // Print the new P/L in the Experts log
48.                     Print("Position ticket: ", ticket, ", P/L: ", profit_str);
49.  
50.                     // Reset the last request and result variables
51.                     last_request.action = 0;
52.                     last_request.order = 0;
53.                     last_result.retcode = 0;
54.                     last_result.order = 0;
55.                     last_result.volume = 0;
56.                     last_result.price = 0;
57.                 }
58.             }
59.             else
60.             {
61.                 // Make a trade request to get the P/L for the current position
62.                 MqlTradeRequest request;
63.                 ZeroMemory(&request, sizeof(request));
64.                 request.action = TRADE_ACTION_DEAL;
65.                 request.symbol = PositionGetSymbol(i);
66.                 request.order = ticket;
67.                 request.type = ORDER_TYPE_SELL;
68.                 request.volume = PositionGetDouble(POSITION_IDENTIFIER, POSITION_VOLUME);
69.                 request.price = SymbolInfoDouble(request.symbol, SYMBOL_ASK);
70.                 request.sl = PositionGetDouble(POSITION_IDENTIFIER, POSITION_SL);
71.                 request.tp = PositionGetDouble(POSITION_IDENTIFIER, POSITION_TP);
72.  
73.                 // Send the trade request to the server
74.                 int result = OrderSend(request, last_result);
75.  
76.                 // Check if the trade request was successful
77.                 if (result > 0)
78.                 {
79.                     // Update the last trade request made
80.                     last_request = request;
81.                 }
82.                 else
83.                 {
84.                     // Print the error message in the Experts log
85.                     Print("Trade request error: ", ErrorDescription(GetLastError()));
86.                 }
87.             }
88.         }
89.     }
90. }