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CustomRatesUpdate

CustomRatesUpdate

将丢失的柱形图添加到自定义交易品种历史并用MqlRates类型数组数据替换现有数据。

int  CustomRatesUpdate(
   const string     symbol,             //自定义交易品种名称
   const MqlRates&  rates[],            // 即将用于自定义交易品种的数据数组
   uint             count=WHOLE_ARRAY   // 即将使用的rates[]数组元素的数量
   );

参数

交易品种

[in] 自定义交易品种名称。

rates[]

[in] M1的MqlRates类型历史数据数组。

count=WHOLE_ARRAY

[in] 即将用于更新的rates[]数组元素的数量。WHOLE_ARRAY意味着所有rates[]数组元素都应被使用。

返回值

已更新柱形图的数量,错误情况下为-1。

注意

如果当前自定义交易品种的历史中没有rates[]数组柱形图,则需要添加该柱形图。如果已存在这个柱形图,则它可被替换。当前价格历史的其他所有柱形图保持不变。有关高开低收价格应该是正确的rates[]数组数据,而开盘时间柱形图应该对应M1 时间周期

示例:

//+------------------------------------------------------------------+
//|                                            CustomRatesUpdate.mq5 |
//|                                  Copyright 2024, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2024, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

#define   CUSTOM_SYMBOL_NAME     Symbol()+".C"     // 自定义交易品种名称
#define   CUSTOM_SYMBOL_PATH     "Forex"           // 创建的交易品种所在组的名称
#define   CUSTOM_SYMBOL_ORIGIN   Symbol()          // 自定义交易品种的基础交易品种名称

#define   DATARATES_COUNT        4                 // 发送到日志的柱形数量

//+------------------------------------------------------------------+
//| 脚本程序起始函数                                                   |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- 取得创建自定义交易品种时的错误代码
   int create=CreateCustomSymbol(CUSTOM_SYMBOL_NAME, CUSTOM_SYMBOL_PATH, CUSTOM_SYMBOL_ORIGIN);

//--- 如果错误代码不为0 (创建交易品种成功) 也不为 5304 (交易品种已经被创建) - 退出
   if(create!=0 && create!=5304)
      return;

//--- 读取并在日志中打印标准交易品种柱形数量
   int bars_origin=Bars(CUSTOM_SYMBOL_ORIGIN, PERIOD_M1);
   PrintFormat("The symbol '%s' from which the custom '%s' was created has %d bars of minute history.", CUSTOM_SYMBOL_ORIGIN, CUSTOM_SYMBOL_NAME, bars_origin);

//--- 读取并在日志中打印自定义交易品种柱形数量
   int bars_custom=Bars(CUSTOM_SYMBOL_NAME, PERIOD_M1);
   PrintFormat("Custom symbol '%s' created from symbol '%s' has %d bars of minute history", CUSTOM_SYMBOL_NAME, CUSTOM_SYMBOL_ORIGIN, bars_custom);

//--- 把标准交易品种1分钟时段的所有柱形数据读取至 MqlRates 数组
   MqlRates rates[]={};
   ResetLastError();
   if(CopyRates(CUSTOM_SYMBOL_ORIGIN, PERIOD_M1, 0, bars_origin, rates)!=bars_origin)
     {
      PrintFormat("CopyRates(%s, PERIOD_M1, 0, %d) failed. Error %d", CUSTOM_SYMBOL_ORIGIN, bars_origin, GetLastError());
      return;
     }

//--- 把复制的数据设为自定义交易品种的分钟历史
   ResetLastError();
   int updated=CustomRatesUpdate(CUSTOM_SYMBOL_NAME, rates);
   if(updated<0)
     {
      PrintFormat("CustomRatesUpdate(%s) failed. Error %d", CUSTOM_SYMBOL_NAME, GetLastError());
      return;
     }

//--- 在添加历史后读取并在日志中打印自定义交易品种的柱形数量
   bars_custom=Bars(CUSTOM_SYMBOL_NAME, PERIOD_M1);
   PrintFormat("\nAfter CustomRatesUpdate(), the custom symbol '%s' has %d bars of minute history", CUSTOM_SYMBOL_NAME, bars_custom);

//--- 把自定义交易品种1分钟时段的所有柱形数据读取至 MqlRates 数组
   ResetLastError();
   if(CopyRates(CUSTOM_SYMBOL_NAME, PERIOD_M1, 0, bars_custom, rates)!=bars_custom)
     {
      PrintFormat("CopyRates(%s, PERIOD_M1, 0, %d) failed. Error %d", CUSTOM_SYMBOL_NAME, bars_custom, GetLastError());
      return;
     }

//--- 在日志中打印自定义交易品种分钟历史的最后四个柱形
   int digits=(int)SymbolInfoInteger(CUSTOM_SYMBOL_NAME, SYMBOL_DIGITS);
   PrintFormat("Last %d bars of the custom symbol's minute history:", DATARATES_COUNT);
   ArrayPrint(rates, digits, NULL, bars_custom-DATARATES_COUNT, DATARATES_COUNT);

//--- 把 MqlRates 数组中的数据替换成计算后的数据,公式为 1.0 / SymbolName
   for(int i=0; i<bars_custom; i++)
     {
      rates[i].open  =(rates[i].open !=0  ? 1.0 / rates[i].open  : rates[i].open);
      rates[i].high  =(rates[i].high !=0  ? 1.0 / rates[i].high  : rates[i].high);
      rates[i].low   =(rates[i].low  !=0  ? 1.0 / rates[i].low   : rates[i].low);
      rates[i].close =(rates[i].close!=0  ? 1.0 / rates[i].close : rates[i].close);
     }

//--- 把修改过的数据设置为自定义交易品种的分钟历史
   ResetLastError();
   updated=CustomRatesUpdate(CUSTOM_SYMBOL_NAME, rates);
   if(updated<0)
     {
      PrintFormat("CustomRatesUpdate(%s) failed. Error %d", CUSTOM_SYMBOL_NAME, GetLastError());
      return;
     }

//--- 再次把自定义交易品种分钟时段的所有柱形数据读取至 MqlRates 数组
   ResetLastError();
   if(CopyRates(CUSTOM_SYMBOL_NAME, PERIOD_M1, 0, bars_custom, rates)!=bars_custom)
     {
      PrintFormat("CopyRates(%s, PERIOD_M1, 0, %d) failed. Error %d", CUSTOM_SYMBOL_NAME, bars_custom, GetLastError());
      return;
     }

//--- 在日志中打印更新过的自定义交易品种分钟历史中的最后四个柱形
   Print("\nLast %d bars after changing the custom symbol calculation formula:", DATARATES_COUNT);
   ArrayPrint(rates, digits, NULL, bars_custom-DATARATES_COUNT, DATARATES_COUNT);

//--- 在图表注释区显示脚本终止键的提示
   Comment(StringFormat("Press 'Esc' to exit or 'Del' to delete the '%s' symbol and exit", CUSTOM_SYMBOL_NAME));
//--- 在无尽循环中等待按下 Esc 或 Del 键
   while(!IsStopped() && TerminalInfoInteger(TERMINAL_KEYSTATE_ESCAPE)==0)
     {
      Sleep(16);
      //--- 当按下 Del 时, 删除所创建的自定义交易品种和它的数据
      if(TerminalInfoInteger(TERMINAL_KEYSTATE_DELETE)<0)
        {
         //--- 删除柱形数据
         int deleted=CustomRatesDelete(CUSTOM_SYMBOL_NAME, 0, LONG_MAX);
         if(deleted>0)
            PrintFormat("%d history bars of the custom symbol '%s' were successfully deleted", deleted, CUSTOM_SYMBOL_NAME);

         //--- 删除报价数据
         deleted=CustomTicksDelete(CUSTOM_SYMBOL_NAME, 0, LONG_MAX);
         if(deleted>0)

//--- 删除交易品种
         if(DeleteCustomSymbol(CUSTOM_SYMBOL_NAME))
            PrintFormat("Custom symbol '%s' deleted successfully", CUSTOM_SYMBOL_NAME);
         break;
        }
     }
//--- 退出前清空图表
   Comment("");
   /*
   结果:
   The symbol 'EURUSD' from which the custom 'EURUSD.C' was created has 250488 bars of minute history.
   Custom symbol 'EURUSD.C' created from symbol 'EURUSD' has 0 bars of minute history

   After CustomRatesUpdate(), the custom symbol 'EURUSD.C' has 250488 bars of minute history
   Last 4 bars of the custom symbol's minute history:
                    [time]  [open]  [high]   [low] [close] [tick_volume] [spread] [real_volume]
   [0] 2024.06.18 11:14:00 1.07235 1.07239 1.07232 1.07239            24        0             0
   [1] 2024.06.18 11:15:00 1.07238 1.07239 1.07232 1.07235            44        0             0
   [2] 2024.06.18 11:16:00 1.07234 1.07238 1.07227 1.07234            37        0             0
   [3] 2024.06.18 11:17:00 1.07234 1.07234 1.07217 1.07225            41        0             0

   Last 4 bars after changing the custom symbol calculation formula:
                    [time]  [open]  [high]   [low] [close] [tick_volume] [spread] [real_volume]
   [0] 2024.06.18 11:14:00 0.93253 0.93250 0.93256 0.93250            24        0             0
   [1] 2024.06.18 11:15:00 0.93251 0.93250 0.93256 0.93253            44        0             0
   [2] 2024.06.18 11:16:00 0.93254 0.93251 0.93260 0.93254            37        0             0
   [3] 2024.06.18 11:17:00 0.93254 0.93254 0.93269 0.93262            41        0             0
   */
  }
//+------------------------------------------------------------------+
//| 创建一个自定义交易品种, 返回错误代码                                  |
//+------------------------------------------------------------------+
int CreateCustomSymbol(const string symbol_name, const string symbol_path, const string symbol_origin=NULL)
  {
//--- 定义自定义交易品种所基于的交易品种名称
   string origin=(symbol_origin==NULL ? Symbol() : symbol_origin);

//--- 如果创建自定义交易品种失败并且错误代码不是 5304, 在日志中报告
   ResetLastError();
   int error=0;
   if(!CustomSymbolCreate(symbol_name, symbol_path, origin))
     {
      error=GetLastError();
      if(error!=5304)
         PrintFormat("CustomSymbolCreate(%s, %s, %s) failed. Error %d", symbol_name, symbol_path, origin, error);
     }
//--- 成功
   return(error);
  }
//+------------------------------------------------------------------+
//| 删除一个自定义交易品种                                              |
//+------------------------------------------------------------------+
bool DeleteCustomSymbol(const string symbol_name)
  {
//--- 从市场报价窗口中隐藏交易品种
   ResetLastError();
   if(!SymbolSelect(symbol_name, false))
     {
      PrintFormat("SymbolSelect(%s, false) failed. Error %d", GetLastError());
      return(false);
     }

//--- 如果删除自定义交易品种失败,在日志中报告并返回 'false'
   ResetLastError();
   if(!CustomSymbolDelete(symbol_name))
     {
      PrintFormat("CustomSymbolDelete(%s) failed. Error %d", symbol_name, GetLastError());
      return(false);
     }
//--- 成功
   return(true);
  }

另见

CustomRatesReplaceCustomRatesDeleteCopyRates