AccountInfoDouble(40)     净值

AccountInfoInteger(47)     最多订单数

SymbolInfoDouble（symbol,1）==0 没有找到货币

SymbolInfoInteger(Symbol(),18) 点差spread

SymbolInfoInteger(symb,27)      TERMINAL_SCREEN_DPI

SymbolInfoInteger(symb,29)      SYMBOL_TRADE_CALC_MODE

 1 SymbolInfoDouble(sy,SYMBOL_LASTLOW) MODE_LOW
 2 SymbolInfoDouble(sy,SYMBOL_LASTHIGH) MODE_HIGH
 5 SymbolInfoInteger(sy,SYMBOL_TIME) MODE_TIME
 9 SymbolInfoDouble(sy,SYMBOL_BID) MODE_BID
 10 SymbolInfoDouble(sy,SYMBOL_ASK) /MODE_ASK
 11 SymbolInfoDouble(sy,SYMBOL_POINT) MODE_POINT

 12 SymbolInfoInteger(sy,SYMBOL_DIGITS) MODE_DIGITS
 13 SymbolInfoInteger(sy,SYMBOL_SPREAD) MODE_SPREAD
 14 SymbolInfoInteger(sy,SYMBOL_TRADE_STOPS_LEVEL) MODE_STOPLEVEL

 15 SymbolInfoDouble(sy,SYMBOL_TRADE_CONTRACT_SIZE) MODE_LOTSIZE

 16 SymbolInfoDouble(sy,SYMBOL_TRADE_TICK_VALUE) MODE_TICKVALUE 

 17 SymbolInfoDouble(sy,SYMBOL_TRADE_TICK_SIZE) MODE_TICKSIZE

 18 SymbolInfoDouble(sy,SYMBOL_SWAP_LONG) MODE_SWAPLONG 
 19 SymbolInfoDouble(sy,SYMBOL_SWAP_SHORT) MODE_SWAPSHORT
 23 SymbolInfoDouble(sy,SYMBOL_VOLUME_MIN) MODE_MINLOT 
 24 SymbolInfoDouble(sy,SYMBOL_VOLUME_STEP) MODE_LOTSTEP
 25 SymbolInfoDouble(sy,SYMBOL_VOLUME_MAX) MODE_MAXLOT 
 26 SymbolInfoInteger(sy,SYMBOL_SWAP_MODE) MODE_SWAPTYPE
27 SymbolInfoInteger(sy,SYMBOL_TRADE_CALC_MODE) MODE_PROFITCALC_MODE

29 SymbolInfoDouble(sy,SYMBOL_MARGIN_INITIAL) MODE_MARGININIT
30 SymbolInfoDouble(sy,SYMBOL_MARGIN_MAINTENANCE) MODE_MARGINMAINTENANCE

32 MODE_MARGINREQUIRED

{
      double f1=0,f2=0; bool aa=0;
      aa=OrderCalcMargin(ORDER_TYPE_BUY,sy,1.0,SymbolInfoDouble(sy,SYMBOL_ASK),f1);
      aa=OrderCalcMargin(ORDER_TYPE_SELL,sy,1.0,SymbolInfoDouble(sy,SYMBOL_BID),f2);
      return (f1+f2)/2; 
  }

SymbolInfoInteger(sy,33)  SYMBOL_TRADE_FREEZE_LEVEL

SymbolInfoDouble(Symbol(),34) 最小手数 

SymbolInfoDouble(Symbol(),35) 最大手数

SymbolInfoDouble(NULL,36)  lotstep

SymbolInfoInteger(NULL,37) >=3 疑似SYMBOL_SWAP_ROLLOVER3DAYS

SymbolInfoDouble(NULL,38)  疑似SYMBOL_SWAP_LONG
SymbolInfoDouble(NULL,39)  疑似SYMBOL_SWAP_SHORT

SymbolInfoDouble（symbol,65） 应用价格

TerminalInfoInteger（5）版本号