void OnTick()
{
    static int last_total_positions = -1; // The last total number of open positions
    static MqlTradeRequest last_request = {0}; // The last trade request made
    static MqlTradeResult last_result = {0}; // The last trade result received

    // Retrieve the total number of open positions
    int total_positions = PositionsTotal();

    // Check if there are any open positions
    if (total_positions > 0)
    {
        // Check if the total number of open positions has changed
        if (total_positions != last_total_positions)
        {
            // Print the new total number of open positions in the Experts log
            Print("Total open positions: ", total_positions);

            // Update the last total number of open positions received
            last_total_positions = total_positions;
        }

        // Loop through all open positions
        for (int i = 0; i < total_positions; i++)
        {
            // Get the ticket number for the current position
            ulong ticket = PositionGetTicket(i);

            // Check if we already made a request for this position
            if (last_request.action == TRADE_ACTION_DEAL && last_request.order == ticket)
            {
                // Check if we received a result for the previous request
                if (last_result.retcode == TRADE_RETCODE_DONE)
                {
                    // Get the P/L for the current position from the trade result
                    double profit = last_result.profit;

                    // Convert the P/L to a string
                    string profit_str = DoubleToString(profit, Digits);

                    // Create the JSON payload for the WebSocket server
                    string payload = "{"ticket": " + IntegerToString(ticket) + ", "profit": " + profit_str + "}";

                    // Send the P/L to the WebSocket server
                    WebRequest(websocket_handle, "SEND", payload, "", "");

                    // Print the new P/L in the Experts log
                    Print("Position ticket: ", ticket, ", P/L: ", profit_str);

                    // Reset the last request and result variables
                    last_request.action = 0;
                    last_request.order = 0;
                    last_result.retcode = 0;
                    last_result.order = 0;
                    last_result.volume = 0;
                    last_result.price = 0;
                }
            }
            else
            {
                // Make a trade request to get the P/L for the current position
                MqlTradeRequest request;
                ZeroMemory(&request, sizeof(request));
                request.action = TRADE_ACTION_DEAL;
                request.symbol = PositionGetSymbol(i);
                request.order = ticket;
                request.type = ORDER_TYPE_SELL;
                request.volume = PositionGetDouble(POSITION_IDENTIFIER, POSITION_VOLUME);
                request.price = SymbolInfoDouble(request.symbol, SYMBOL_ASK);
                request.sl = PositionGetDouble(POSITION_IDENTIFIER, POSITION_SL);
                request.tp = PositionGetDouble(POSITION_IDENTIFIER, POSITION_TP);

                // Send the trade request to the server
                int result = OrderSend(request, last_result);

                // Check if the trade request was successful
                if (result > 0)
                {
                    // Update the last trade request made
                    last_request = request;
                }
                else
                {
                    // Print the error message in the Experts log
                    Print("Trade request error: ", ErrorDescription(GetLastError()));
                }
            }
        }
    }
}