MQL4 代码错误 'OP_PENDING' - undeclared identifier 解决方法

MQL4 代码错误 'OP_PENDING' - undeclared identifier 解决方法

如果您在 MQL4 代码中遇到 'OP_PENDING' - undeclared identifier 错误，通常是因为您的 MetaTrader 4 平台版本过旧，不支持 OP_PENDING 常量。

解决方法：

1. 升级 MetaTrader 4 平台： 尝试升级到最新版本的 MetaTrader 4。最新版本通常包含最新的 MQL4 定义和常量。

2. 手动定义 OP_PENDING： 如果无法升级 MetaTrader 4，您可以在代码中手动定义 OP_PENDING 常量。在代码的开头添加以下行：

MQL4 #define OP_PENDING 6

完整代码示例：

以下是一个完整的 MQL4 代码示例，其中包含 OP_PENDING 的正确用法：MQ4#property copyright 'Copyright 2023, Your Name'#property link 'https://www.example.com'#property version '1.00'

#define OP_PENDING 6

extern int magicNumber = 92133;extern double initialLots = 0.5;extern double takeProfitAmount = 80;extern int maxReentries = 4;extern int reentryPips = 100;extern int slippage = 4;

int totalOrders = 0;double totalProfit = 0;bool hasOpenPosition = false;

void OnTick(){ double currentPrice = Ask; double entryPrice;

// Check for open position    if (hasOpenPosition)    {        // Check if take profit is reached        if (totalProfit >= takeProfitAmount)        {            CloseAllOrders();            DeleteAllPendings();            Sleep(60000); // Wait for 1 minute before restart            ResetVariables();            return;        }

    // Check for reentry conditions        if (OrdersTotal() < maxReentries)        {            if (OrderSelect(totalOrders - 1, SELECT_BY_POS, MODE_TRADES) && OrderSymbol() == Symbol() && OrderMagicNumber() == magicNumber)            {                if (OrderType() == OP_BUY && currentPrice >= entryPrice + reentryPips * Point)                {                    entryPrice = currentPrice;                    double lots = OrderLots() * 2;                    if (lots > MarketInfo(Symbol(), MODE_MINLOT))                        OrderSend(Symbol(), OP_BUY, lots, currentPrice, slippage, 0, 0, 'Reentry', magicNumber, 0, Blue);                }                else if (OrderType() == OP_SELL && currentPrice <= entryPrice - reentryPips * Point)                {                    entryPrice = currentPrice;                    double lots = OrderLots() * 2;                    if (lots > MarketInfo(Symbol(), MODE_MINLOT))                        OrderSend(Symbol(), OP_SELL, lots, currentPrice, slippage, 0, 0, 'Reentry', magicNumber, 0, Red);                }            }        }    }    else    {        // Check for initial entry conditions        if (currentPrice >= currentPrice + 200 * Point)        {            entryPrice = currentPrice;            OrderSend(Symbol(), OP_BUY, initialLots, currentPrice, slippage, 0, 0, 'Initial Entry', magicNumber, 0, Blue);            hasOpenPosition = true;            totalOrders++;        }        else if (currentPrice <= currentPrice - 200 * Point)        {            entryPrice = currentPrice;            OrderSend(Symbol(), OP_SELL, initialLots, currentPrice, slippage, 0, 0, 'Initial Entry', magicNumber, 0, Red);            hasOpenPosition = true;            totalOrders++;        }    }}

void OnTrade(){ totalProfit = 0;

for (int i = 0; i < OrdersTotal(); i++)    {        if (OrderSelect(i, SELECT_BY_POS, MODE_TRADES))        {            if (OrderSymbol() == Symbol() && OrderMagicNumber() == magicNumber && OrderType() != OP_PENDING)            {                totalProfit += OrderProfit();            }        }    }}

void CloseAllOrders(){ for (int i = OrdersTotal() - 1; i >= 0; i--) { if (OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) { if (OrderSymbol() == Symbol() && OrderMagicNumber() == magicNumber) { OrderClose(OrderTicket(), OrderLots(), Bid, slippage, Red); totalOrders--; } } }}

void DeleteAllPendings(){ for (int i = OrdersTotal() - 1; i >= 0; i--) { if (OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) { if (OrderSymbol() == Symbol() && OrderType() == OP_PENDING && OrderMagicNumber() == magicNumber) { OrderDelete(OrderTicket()); } } }}

void ResetVariables(){ hasOpenPosition = false; totalProfit = 0; totalOrders = 0;}

通过以上步骤，您应该能够解决 MQL4 代码中出现的 'OP_PENDING' - undeclared identifier 错误。