string  HistoryDealGetString(
   ulong                      ticket_number,     // 订单号
   ENUM_DEAL_PROPERTY_STRING  property_id        // 属性标识符
   );

bool  HistoryDealGetString(
   ulong                      ticket_number,     //订单号
   ENUM_DEAL_PROPERTY_STRING  property_id,       // 属性标识符
   string&                    string_var         // 这里接受属性值
   );

//+------------------------------------------------------------------+
//| 脚本程序起始函数                                                   |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- 请求交易和订单历史
   if(!HistorySelect(0, TimeCurrent()))
     {
      Print("HistorySelect() failed. Error ", GetLastError());
      return;
     }

//--- 根据账户历史中的交易列表做循环
   int total=HistoryDealsTotal();
   for(int i=0; i<total; i++)
     {
      //--- 取得下一个交易的编号 (自动选择交易以取得它的属性)
      ulong ticket=HistoryDealGetTicket(i);
      if(ticket==0)
         continue;

      //--- 取得交易的类型和方向并显示选中交易实数属性列表的标题
      string type=DealTypeDescription((ENUM_DEAL_TYPE)HistoryDealGetInteger(ticket, DEAL_TYPE));
      string entry=DealEntryDescription((ENUM_DEAL_ENTRY)HistoryDealGetInteger(ticket, DEAL_ENTRY));
      PrintFormat("String properties of an deal %s entry %s #%I64u:", type, entry, ticket);

      //--- 在标题下方打印选中交易的全部实数类型属性
      HistoryDealPropertiesStringPrint(ticket, 13);
     }
   /*
  结果：
   String properties of an deal Buy entry In #2785021084:
   Symbol:      EURUSD
   Comment:     Test PositionGetString
   Extarnal ID:
   String properties of an deal Buy entry Out #2497993663:
   Symbol:      EURUSD
   Comment:     [tp 1.08639]
   Extarnal ID:
   */
  }
//+------------------------------------------------------------------+
//| 在日志中显示选中交易的字符串型属性                                    |
//+------------------------------------------------------------------+
void HistoryDealPropertiesStringPrint(const ulong ticket, const uint header_width=0)
  {
   uint   w=0;
   string header="";
   string value ="";

//--- 定义标题文字和标题栏位的宽度
//--- 如果传给函数的标题宽度为0, 则宽度为标题文字行的大小+1
   header="Symbol:";
   w=(header_width==0 ? header.Length()+1 : header_width);
//--- 取得并在日志中以指定标题宽度显示交易的交易品种
   if(!HistoryDealGetString(ticket, DEAL_SYMBOL, value))
      return;
   PrintFormat("%-*s%-s", w, header, value);

//--- 在日志中显示交易的注释
   header="Comment:";
   w=(header_width==0 ? header.Length()+1 : header_width);
   if(!HistoryDealGetString(ticket, DEAL_COMMENT, value))
      return;
   PrintFormat("%-*s%-s", w, header, value);

//--- 显示外部交易系统中的交易 ID
   header="Extarnal ID:";
   w=(header_width==0 ? header.Length()+1 : header_width);
   if(!HistoryDealGetString(ticket, DEAL_EXTERNAL_ID, value))
      return;
   PrintFormat("%-*s%-s", w, header, value);
  }
//+------------------------------------------------------------------+
//| 返回交易类型的描述                                                  |
//+------------------------------------------------------------------+
string DealTypeDescription(const ENUM_DEAL_TYPE type)
  {
   switch(type)
     {
      case DEAL_TYPE_BUY                     :  return("Buy");
      case DEAL_TYPE_SELL                    :  return("Sell");
      case DEAL_TYPE_BALANCE                 :  return("Balance");
      case DEAL_TYPE_CREDIT                  :  return("Credit");
      case DEAL_TYPE_CHARGE                  :  return("Additional charge");
      case DEAL_TYPE_CORRECTION              :  return("Correction");
      case DEAL_TYPE_BONUS                   :  return("Bonus");
      case DEAL_TYPE_COMMISSION              :  return("Additional commission");
      case DEAL_TYPE_COMMISSION_DAILY        :  return("Daily commission");
      case DEAL_TYPE_COMMISSION_MONTHLY      :  return("Monthly commission");
      case DEAL_TYPE_COMMISSION_AGENT_DAILY  :  return("Daily agent commission");
      case DEAL_TYPE_COMMISSION_AGENT_MONTHLY:  return("Monthly agent commission");
      case DEAL_TYPE_INTEREST                :  return("Interest rate");
      case DEAL_TYPE_BUY_CANCELED            :  return("Canceled buy deal");
      case DEAL_TYPE_SELL_CANCELED           :  return("Canceled sell deal");
      case DEAL_DIVIDEND                     :  return("Dividend operations");
      case DEAL_DIVIDEND_FRANKED             :  return("Franked (non-taxable) dividend operations");
      case DEAL_TAX                          :  return("Tax charges");
      default                                :  return("Unknown deal type: "+(string)type);
     }
  }
//+------------------------------------------------------------------+
//| 返回仓位变化的方法                                                  |
//+------------------------------------------------------------------+
string DealEntryDescription(const ENUM_DEAL_ENTRY entry)
  {
   switch(entry)
     {
      case DEAL_ENTRY_IN      :  return("In");
      case DEAL_ENTRY_OUT     :  return("Out");
      case DEAL_ENTRY_INOUT   :  return("Reverce");
      case DEAL_ENTRY_OUT_BY  :  return("Out by");
      case DEAL_ENTRY_STATE   :  return("Status record");
      default                 :  return("Unknown deal entry: "+(string)entry);
     }
  }