MT5編程--簡(jiǎn)單的開(kāi)倉(cāng)實(shí)例
作者：MT4 來(lái)源：cxh99.com 發(fā)布時(shí)間：2012年05月21日
- 一開(kāi)始同學(xué)們都會(huì)被MQL5的開(kāi)倉(cāng)平倉(cāng)搞暈，這里通過(guò)編制一個(gè)簡(jiǎn)單的開(kāi)倉(cāng)EA 讓大家獲得概念上的認(rèn)識(shí)。
基礎(chǔ)概念：
MQL5里開(kāi)倉(cāng)函數(shù)還是OrderSend，不過(guò)參數(shù)變了，它 的參數(shù)變成了兩個(gè)需要提前賦值的“結(jié)構(gòu)”
復(fù)制代碼-
- bool OrderSend(
- MqlTradeRequest& request // query structure
- MqlTradeResult& result // structure of the answer
- );
參數(shù)一：是MqlTradeRequest類型，用于存儲(chǔ)開(kāi)倉(cāng)平倉(cāng)以及修改訂單所需的各種信息。
復(fù)制代碼-
- struct MqlTradeResult
- {
- struct MqlTradeRequest
- {
- ENUM_TRADE_REQUEST_ACTIONS action; // Trade operation type
- ulong magic; // Expert ID (magic mumber)
- ulong order; // Order ticket
- string symbol; // Trade symbol
- double volume; // Requested volume for a deal in lots
- double price; // Price
- double stoplimit; // StopLimit price of the order
- double sl; // Stop Loss price of the order
- double tp; // Take Profit price of the order
- ulong deviation; // Maximal possible deviation from the requested price
- ENUM_ORDER_TYPE type; // Order type
- ENUM_ORDER_TYPE_FILLING type_filling; // Order execution type
- ENUM_ORDER_TYPE_TIME type_time; // Order execution time
- datetime expiration; // Order expiration time (for the orders of ORDER_TIME_SPECIFIED type)
- string comment; // Order comment
- };
參數(shù)二：是MqlTradeResult類型，用于存儲(chǔ)開(kāi)倉(cāng)指令執(zhí)行完的返回信息。
復(fù)制代碼-
- struct MqlTradeResult
- {
- uint retcode; // Operation return code
- ulong deal; // Deal ticket, if it has performed
- ulong order; // Order ticket, if it has placed
- double volume; // Deal volume, confirmed by broker
- double price; // Deal price, confirmed by broker
- double bid; // Current Bid price
- double ask; // Current Ask price
- string comment; // Broker comment to operation (by default it filled by the operation description)
- };
因此要開(kāi)倉(cāng)前，先要定義好著兩個(gè)結(jié)構(gòu)變量，然后對(duì)MqlTradeRequest變量進(jìn)行必要的賦值，例如：開(kāi)倉(cāng)價(jià) 買(mǎi)賣(mài) 開(kāi)倉(cāng)數(shù)量 止損止盈等等。
然后，使用OrderSend語(yǔ)句發(fā)送出這個(gè)指令。至于是否執(zhí)行成功，則需要查詢執(zhí)行后的MqlTradeResult結(jié)構(gòu)的返回值。
本例的源代碼如下：
復(fù)制代碼- //+------------------------------------------------------------------+
- //| 1.mq5 |
- //| Copyright 2009, 520FX. |
- //| bbs.520fx.com |
- //+------------------------------------------------------------------+
- #property copyright "2009, 520FX."
- #property link "bbs.520fx.com"
- #property version "1.00"
- /*
- 本程序?yàn)楹?jiǎn)單示意如何在MQL5下開(kāi)倉(cāng)
- */
- MqlTradeRequest MyTrade;
- MqlTradeResult MyResult;
- MqlTick MyTick;
- void OnTick()
- {
- SymbolInfoTick(Symbol(),MyTick);
- MyTrade.action=TRADE_ACTION_DEAL;
- MyTrade.magic=123456;
- MyTrade.symbol=Symbol();
- MyTrade.volume=0.1;
- MyTrade.price=MyTick.ask;
- MyTrade.deviation=100;
- MyTrade.type=ORDER_TYPE_BUY;
- MyTrade.type_filling=ORDER_FILLING_AON;
- MyTrade.comment="Test";
- MyTrade.sl=0.0;
- MyTrade.tp=0.0;
- PositionSelect(Symbol(),0);
- double MyVolume=PositionGetDouble(POSITION_VOLUME);
- if(MyVolume<=0.3)
- OrderSend(MyTrade,MyResult);
- Print(MyResult.retcode," ",MyResult.ask," ",SymbolInfoInteger(Symbol(),SYMBOL_DIGITS)," ",MyVolume);
- }
細(xì)心的同學(xué)可能會(huì)注意到本例里還演示了其他幾個(gè)常用的問(wèn)題：
1、如何獲得當(dāng)前商品的買(mǎi)賣(mài)價(jià)格
2、如何獲得當(dāng)前持倉(cāng)單的具體信息
注意：
程序里這句話
MyTrade.symbol=Symbol();
一定不能使用下面的方式
MyTrade.symbol=NULL;
栽自www.520fx.com
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