4.固定字

MetaQuotes 4 語言使用下面的幾組固定字。www.emoneybtc.com

1. 邏輯符號。
AND, NOT, OR.

2. MQL 4語言指令。
Array, Begin, Break, Continue, Define, Downto, Else, End, Exit, For, If, Input, Then, To, Variable, While。界定語言指令結構的固定字也叫做關鍵字。

3. 內置函數。
Abs, AccName, AccountName, Alert, Ceil, CloseOrder, Comment, Cos, CurTime, Day, DayOfWeek, DeleteOrder, Exp, Floor, Highest, Hour, iADX, iATR, iBANDS, iCCI, iMA, iMACD, iMFI, iMOM, iRSI, iSAR, iSTO, iWPR, IsDemo, IsIndirect, LastTradeTime, Log, Lowest, Minute, Mod, ModifyOrder, Month, MoveObject, NumberToStr, Ord, OrderValue, Period, Pow, Print, PrintTrade, Rand, Round, ServerAddress, SetArrow, SetObjectText, SetOrder, SetText, Sin, Sqrt, Srand, Symbol, Tan, TimeToStr, Year.

4. 預先設定用戶變量（用戶定義變量）。
Lots, StopLoss, TakeProfit, TrailingStop.

5. 預先設定交易終端變量。
AccNum, AccountNumber, Ask, Balance, Bars, Bid, Close, Credit, Equity, FreeMargin, High, Low, Margin, Open, Point, PriceAsk, PriceBid, PriceHigh, PriceLow, PriceTime, Time, TotalProfit, TotalTrades, Volume.

6. 預先設定內置函數參數（宏命令）。
MODE_CLOSE, MODE_EMA, MODE_HIGH, MODE_LOW, MODE_MAIN, MODE_MINUSDI, MODE_OPEN, MODE_PLUSDI, MODE_SIGNAL, MODE_SMA, MODE_STOPLOSS, MODE_TAKEPROFIT, MODE_VOLUME, MODE_WMA, OBJ_HLINE, OBJ_SYMBOL, OBJ_TEXT, OBJ_TRENDLINE, OBJ_VLINE, OP_BUY, OP_BUYLIMIT, OP_BUYSTOP, OP_SELL, OP_SELLLIMIT, OP_SELLSTOP, SYMBOL_ARROWDOWN, SYMBOL_ARROWUP, SYMBOL_CHECKSIGN, SYMBOL_STOPSIGN, SYMBOL_THUMBSDOWN, SYMBOL_THUMBSUP, VAL_CLOSEPRICE, VAL_CLOSETIME, VAL_COMISSION, VAL_COMMENT, VAL_LOTS, VAL_OPENPRICE, VAL_OPENTIME, VAL_PROFIT, VAL_STOPLOSS, VAL_SWAP, VAL_SYMBOL, VAL_TAKEPROFIT, VAL_TICKET, VAL_TYPE.

實際上，上述固定字為宏記錄器，即語法分析程序用數值取而代之。宏記錄器的引入簡化了編寫用戶功能要求的程序：更加方便、無關聯的重要詞語可以用來替代一些函數參數值。同樣可以用於色彩名稱。

7. 色彩。
AliceBlue, AntiqueWhite, Aqua, Aquamarine, Azure, Beige, Bisque, Black, BlanchedAlmond, Blue, BlueViolet, Brown, BurlyWood, CadetBlue, Chartreuse, Chocolate, Coral, CornflowerBlue, Cornsilk, Crimson, Cyan, DarkBlue, DarkCyan, DarkGoldenrod, DarkGray, DarkGreen, DarkKhaki, DarkMagenta, DarkOliveGreen, DarkOrange, DarkOrchid, DarkRed, DarkSalmon, DarkSeaGreen, DarkSlateBlue, DarkSlateGray, DarkTurquoise, DarkViolet, DeepPink, DeepSkyBlue, DimGray, DodgerBlue, FireBrick, FloralWhite, ForestGreen, Fuchsia, Gainsboro, GhostWhite, Gold, Goldenrod, Gray, Green, GreenYellow, Honeydew, HotPink, IndianRed, Indigo, Ivory, Khaki, Lavender, LavenderBlush, LawnGreen, LemonChiffon, LightBlue, LightCoral, LightCyan, LightGoldenrod, LightGreen, LightGrey, LightPink, LightSalmon, LightSeaGreen, LightSkyBlue, LightSlateGray, LightSteelBlue, LightYellow, Lime, LimeGreen, Linen, Magenta, Maroon, MediumAquamarine, MediumBlue, MediumOrchid, MediumPurple, MediumSeaGreen, MediumSlateBlue, MediumSpringGreen, MediumTurquoise, MediumVioletRed, MidnightBlue, MintCream, MistyRose, Moccasin, NavajoWhite, Navy, OldLace, Olive, OliveDrab, Orange, OrangeRed, Orchid, PaleGoldenrod, PaleGreen, PaleTurquoise, PaleVioletRed, PapayaWhip, PeachPuff, Peru, Pink, Plum, PowderBlue, Purple, Red, RosyBrown, RoyalBlue, SaddleBrown, Salmon, SandyBrown, SeaGreen, Seashell, Sienna, Silver, SkyBlue, SlateBlue, SlateGray, Snow, SpringGreen, SteelBlue, Tan, Teal, Thistle, Tomato, Turquoise, Violet, Wheat, White, WhiteSmoke, Yellow, YellowGreen.

所有的固定字均是非敏感字號，即它們可以小寫也可以大寫。

4.1. 智能交易系統向導

智能交易系統向導提示MQL 4允許編寫智能交易系統、自編指標、自編腳本和從模板中進行編輯

預先設定參數或變量的名稱，將會自動在文本編輯欄中出現參數框架。