如何将Metatrader 4警报或电子邮件指示信号转换为EA交易以开启交易？

Question

我一直在使用指标来进行交易。我没有开发指标，所以我只能访问.ex4文件。如何在警报或电子邮件信号中提取止盈，开放交易和止损值以开启交易？请参阅下面的电子邮件和警报信号示例。

Answer 1

这是一个原生MQL解决方案的工作示例script，它使用kernel32.dll将日志文件从./MQL4/Logs复制到./MQL4/Files。 LogSignalParser抽象基类需要进行子类化，并且需要实现virtual bool parse()方法。

编辑：@TenOutOfTen想要一个如何在日志文件中解析以下行格式的实际示例：

0 02:20:00.874 SuperIndicator USDCAD,M5: Alert: USDCAD, M5: Super Indicator SELL @ 1.29136, TP 1.28836, SL 1.29286

第1步：将LogParser.mqh保存在有意义的地方。

//LogParser.mqh

#property strict
#include <stdlib.mqh>
#include <Arrays\ArrayString.mqh>
#include <Arrays\ArrayObj.mqh>
#import "kernel32.dll"
   bool CopyFileW(string lpExistingFileName,
                  string lpNewFileName,
                  bool   bFailIfExists);
#import
//+------------------------------------------------------------------+
//|                                                              
//+------------------------------------------------------------------+
class Signal : public CObject
{
public:
   string            symbol;
   datetime          signal_time;
   int               order_type;
   double            price_entry;
   double            price_sl;
   double            price_tp;
   virtual int Compare(const CObject *node,const int mode=0) const override
   {
      const Signal *other=node;
      if(this.signal_time>other.signal_time)
         return 1;
      if(this.signal_time<other.signal_time)
         return -1;
      return 0;
   }
   string to_string()
   {
      return StringFormat("%s - %s(%s) @ %.5f, SL=%.5f, TP=%.5f",
         signal_time,
         symbol,
         order_type==OP_BUYLIMIT ? "BUY" : "SELL",
         price_entry,
         price_sl,
         price_tp
      );
   }
};
//+------------------------------------------------------------------+
//|Vector-like collection                                                          
//+------------------------------------------------------------------+
class SignalList : public CArrayObj
{
   public: Signal *operator[](int i){return this.At(i);}
};
//+------------------------------------------------------------------+
//|Abstract abse class: the parse method must be implemented in subclass                                                             
//+------------------------------------------------------------------+
class LogSignalParser : public CObject
{
protected:
   CArrayString      m_rows;
   SignalList        m_signals;
   string            m_log_file_name;
   string            m_ind_name;
public:
                     LogSignalParser(string indicator_name);

                     // parse method must be overridden!
   virtual bool      parse() = 0;
   int               Total();
   Signal           *operator[](int i);
protected:
   bool              _copy_log();
   int               _open_log();
   bool              _parse_rows();
};
//+------------------------------------------------------------------+
LogSignalParser::LogSignalParser(string indicator_name)
{
   m_log_file_name="copy_log.log";
   m_ind_name=indicator_name;
}
//+------------------------------------------------------------------+
bool LogSignalParser::_copy_log(void)
{
   MqlDateTime t;
   TimeLocal(t);
   string data_path = TerminalInfoString(TERMINAL_DATA_PATH)+"\\MQL4";
   string logs_path = data_path + "\\Logs\\";
   string dest_file = data_path + "\\Files\\" + m_log_file_name;
   string log_file=logs_path+StringFormat("%d%02d%02d.log",
                                          t.year,t.mon,t.day);
   return CopyFileW(log_file, dest_file, false);
}
//+------------------------------------------------------------------+
bool LogSignalParser::_parse_rows()
{
   if(!this._copy_log())
      return false;
   int h= this._open_log();
   if(h == INVALID_HANDLE)
      return false;
   m_rows.Clear();
   while(!FileIsEnding(h)){
      string row=FileReadString(h);
      if(StringFind(row,"Alert:") >= 0 && StringFind(row,m_ind_name) >= 0)
         m_rows.Add(row);
   }
   m_rows.Sort();
   FileClose(h);
   return true;
}
//+------------------------------------------------------------------+
int LogSignalParser::_open_log(void)
{
   return FileOpen(m_log_file_name,
      FILE_TXT|FILE_READ|FILE_SHARE_READ|FILE_SHARE_WRITE);
}
//+------------------------------------------------------------------+
int LogSignalParser::Total(void)
{
   return m_signals.Total();
}
//+------------------------------------------------------------------+
Signal* LogSignalParser::operator[](int i)
{
   return m_signals.At(i);
}

第2步：对LogSignalParser类进行子类化并覆盖parse

//SuperIndicatorParser.mqh
#property strict
#include "LogParser.mqh"
//+------------------------------------------------------------------+
class SuperIndicatorParser : public LogSignalParser
{ 
public:
   SuperIndicatorParser():LogSignalParser("SuperIndicator"){}
   virtual bool parse() override;
};
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+
bool SuperIndicatorParser::parse() override
{
   if(!this._parse_rows())
      return false;
   m_signals.Clear();
   MqlDateTime local;
   TimeLocal(local);
   for(int i=m_rows.Total()-1; i>=0; i--)
   {
      string row=m_rows[i];
      MqlDateTime log_time;
      TimeToStruct(StringToTime(StringSubstr(row, 2, 12)), log_time);
      log_time.year = local.year;
      log_time.mon = local.mon;
      log_time.day = local.day;
      datetime time = StructToTime(log_time); 
      row = StringSubstr(row, StringFind(row, m_ind_name) + StringLen(m_ind_name) + 1);
      StringReplace(row, ",", " ");
      string parts[];
      StringSplit(row, ' ', parts);
      int len = ArraySize(parts);
      string debug = "";
      for(int k=0;k<len;k++)
         debug += "|" + parts[k];
      if(len != 17)
         continue;
      Signal *s      = new Signal();
      s.signal_time  = time;
      s.symbol       = parts[0];
      s.order_type   = parts[8] == "BUY" ? OP_BUYLIMIT : OP_SELLLIMIT;
      s.price_entry  = double(parts[10]);
      s.price_tp     = double(parts[13]);
      s.price_sl     = double(parts[16]);
      m_signals.Add(s);
   }
   m_signals.Sort();
   return true;
}

第3步：在MQL程序中使用（示例脚本）

#property strict
#include "SuperIndicatorParser.mqh"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
{
   SuperIndicatorParser parser;
   if(parser.parse()){
      for(int i=parser.Total()-1; i>=0; i--){
         Signal *s = parser[i];
         int ticket = OrderSend(
            s.symbol, s.order_type, 0.1, 
            s.price_entry, 0, s.price_sl, s.price_tp 
         ); 
         if(ticket < 0){
            Print(_LastError);
         }
      }
   }     
}

Answer 2

由于指标也通过Alert函数发送数据，因此无需从您的电子邮件中提取数据。警报将记录到.\MQL4\Logs文本文件中的*.log目录中。您可以编写一些使用win32读取日志的MQL，然后在MQL中创建自己的解析器。

另一种选择是编写监视程序脚本来扫描和解析日志文件，并将结果写入csv，EA可以访问它。与MQL解决方案相比，这种方法的优势在于它的开发是多么容易，并且因为它适用于所有符号，所以它避免了多个EA同时尝试读取日志写入csv的潜在竞争条件。

这是一个用Python编写的示例。

import csv
import re
import time
from datetime import datetime
from pathlib import Path

MQL_DATA_PATH = Path(
    'C:/Users/user/Desktop/MT-TEST/Vanilla-MT4-v0_0_2/MT4/MQL4'
)
OUTPUT_FILENAME = 'signals.csv'

signal_pattern = re.compile(r'''# regex - verbose mode
    (?P<time>\d\d:\d\d:\d\d).*? # time stamp
    (?P<symbol>[A-Z]{6}\w*),.*? # symbol with ECN suffix
    (?P<type>BUY|SELL).*?       # BUY or SELL command
    (?P<price>\d+\.\d+).*?      # execution price
    (?P<tp>\d+\.\d+).*?         # takeprofit 
    (?P<sl>\d+\.\d+)            # stoploss
''', re.VERBOSE)


def log_to_csv():
    date = datetime.now()
    log_file = MQL_DATA_PATH / 'Logs' / f'{date.strftime("%Y%m%d")}.log'
    with open(log_file) as f:
        log_entries = f.read()
    signals = [s.groupdict() for s in signal_pattern.finditer(log_entries)]
    for signal in signals:
        # correct time to MQL datetime
        signal['time'] = f"{date.strftime('%Y.%m.%d')} {signal['time']}"
    csv_file = MQL_DATA_PATH / 'Files' / OUTPUT_FILENAME
    with open(csv_file, 'w') as f:
        writer = csv.DictWriter(f,
            fieldnames=('time', 'symbol', 'type', 'price', 'tp', 'sl',),
            lineterminator='\n',
        )
        writer.writerows(signals)


def main():
    print(f'Watching MQL log and saving signals to {OUTPUT_FILENAME}')
    print('Press Ctrl+C to exit')
    while True:
        try:
            log_to_csv()
            print(datetime.now().strftime('%Y.%m.%d %H:%M:%S'), end='\r')
            time.sleep(5)
        except KeyboardInterrupt:
            exit()


if __name__ == '__main__':
    main()

Answer 3

MT4无法读取您的电子邮件。您需要使用其他一些工具或更通用的语言来阅读您的电子邮件，Java.Mail.API或Pyhton，或其他。阅读电子邮件，确保格式正确并且来自您期望的发件人，然后将邮件放入MT4可用的文件中 - 自己的文件夹（C：\ Users \ UserName \ AppData \ Roaming \ MetaQuotes \ Terminal \ 12345678E7E35342DB4776F5AE09D64B \ MQL4 \ Files）或Common文件夹（C：\ Users \ User1 \ AppData \ Roaming \ MetaQuotes \ Terminal \ Common \ Files）。然后在MQL4文档中使用FileSearchNext()函数和example从MT4应用程序中读取文件。在读取文件之后，您需要使用String functions解析它，并创建一个OrderSend（）请求（可能检查输入并且您的逻辑允许您的机器人发送交易，例如您没有达到允许的最大交易量） ，交易时间，其他逻辑）。