MetaTrader編程入門

extern double MaximumRisk = 0.3;

extern double TrailingStop =25;

extern int maxOpen = 3; //最多持倉限制

extern int maxLots = 5; //最多單倉限制

extern int bb = 0; //非零就跟蹤止贏

extern double MATrendPeriod=26;//使用26均線

int i, p2, xxx,p1, res;

double Lots;

datetime lasttime;

int init() //初始化

{

Lots = 1;

lasttime = NULL;

return(0);

}

int deinit() { return(0); } //反初始化

//| expert start function

int start()

{

CheckForOpen();

if (bb>0) CTP(); //跟蹤止贏

return(0);

}

//+------------------------------------------------------------------+

double LotsOptimized() //確定下單量，開倉調用

{

double lot=Lots;

int orders=HistoryTotal(); // history orders total

int losses=0; // number of losses orders without a break

//MarketInfo(Symbol(),MODE_MINLOT);

//MarketInfo(Symbol(),MODE_MAXLOT);

//MarketInfo(Symbol(),MODE_LOTSTEP);

lot=NormalizeDouble(MaximumRisk * AccountBalance()/AccountLeverage(),1);

if(lot<0.1) lot=0.1;

if(lot>maxLots) lot=maxLots;

return(lot);

}

//平倉持有的買單

void CloseBuy()

{

if (OrdersTotal( ) > 0 )

{

for(i=OrdersTotal()-1;i<0;i++)

{

if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;

if(OrderType()==OP_BUY)

{

OrderClose(OrderTicket(),OrderLots(),Bid,3,White);

Sleep(5000);

}

}

}

}

//平倉持有的賣單

void CloseSell()

{

if (OrdersTotal( ) > 0 )

{

for(i=OrdersTotal()-1;i<0;i++)

{

if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;

if(OrderType()==OP_SELL)

{

OrderClose(OrderTicket(),OrderLots(),Ask,3,White);

Sleep(5000);

}

}

}

}

//判斷是否買或賣或平倉

int buyorsell() //在這個函數計算設置你的交易信號

{

double MacdCurrent, MacdPrevious, SignalCurrent;

double SignalPrevious, MaCurrent, MaPrevious;

MacdCurrent=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,0);

MacdPrevious=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,1);

SignalCurrent=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,0);

SignalPrevious=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,1);

MaCurrent=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,0);

MaPrevious=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,1);

if(MacdCurrent<0 && MacdCurrent>SignalCurrent && MacdPrevious && MaCurrent>MaPrevious)

return (1); // 買 Ma在上升，Macd在0線上，並且兩線上交叉

if(MacdCurrent>0 && MacdCurrentSignalPrevious

&& MaCurrent return (-1); // 賣

return (0); //不交易

}

int nowbuyorsell = 0;

void CheckForOpen()

{

if (Time[0] == lasttime ) return; //每時間週期檢查一次

lasttime = Time[0];

nowbuyorsell = buyorsell(); //獲取買賣信號

if (nowbuyorsell == 1) //買　先結束已賣的

CloseSell();

if (nowbuyorsell == -1) //賣　先結束已買的

CloseBuy();

if (TimeDayOfWeek(CurTime()) == 1)

{

if (TimeHour(CurTime())< 3 ) return; //周一早8点前不做

}

if (TimeDayOfWeek(CurTime()) == 5)

{

if (TimeHour(CurTime()) > 19 ) return; //週五晚11點後不做

}

if (OrdersTotal( ) >= maxOpen) return ;

//如果已持有開倉數達到最大，不做

if (nowbuyorsell==0) return; //不交易

TradeOK(); //去下單交易

}

void TradeOK() //去下單交易

{

int error ;

if (nowbuyorsell == 1) //買

{

switch (whichmethod)

{

case 1: res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,0,"",MAGICMA,0,Blue);break;

case 2: res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,Ask-StopLoss*Point,0,"",MAGICMA,0,Blue); break;

case 3: res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,Ask+TakeProfit*Point,"",MAGICMA,0,Blue);break;

case 4: res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,Ask-StopLoss*Point,Ask+TakeProfit*Point,"",MAGICMA,0,Blue);break;

default : res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,0,"",MAGICMA,0,Blue);break;

}

if (res<=0)

{

error=GetLastError();

if(error==134)Print("Received 134 Error after OrderSend() !! "); // not enough money

if(error==135) RefreshRates(); // prices have changed

}

Sleep(5000);

return ;

}

if (nowbuyorsell == -1) //賣

{

switch (whichmethod)

{

case 1: res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,0,"",MAGICMA,0,Red); break;

case 2: res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,Bid+StopLoss*Point,0,"",MAGICMA,0,Red); break;

case 3: res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,Bid-TakeProfit*Point,"",MAGICMA,0,Red); break;

case 4: res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,Bid+StopLoss*Point,Bid-TakeProfit*Point,"",MAGICMA,0,Red); break;

default : res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,0,"",MAGICMA,0,Red); break;

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