Freelance service at MQL5.com: Zyjiaoyiz

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Ya7tkQN2//+------------------------------------------------------------------+

//| Moving Average.mq4 |

//| http://www.mql5.com |

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

#property copyright "2000-2025, MetaQuotes Ltd."

#property link "https://www.mql5.com"

#property description "Moving Average sample expert advisor"

#define MAGICMA 20131111

//--- Inputs

input double Lots =0.1;

input double MaximumRisk =0.02;

input double DecreaseFactor=3;

input int MovingPeriod =12;

input int MovingShift =6;

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

//| Calculate open positions |

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

int CalculateCurrentOrders(string symbol)

{

int buys=0,sells=0;

//---

for(int i=0;i<OrdersTotal();i++)

{

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

if(OrderSymbol()==Symbol() && OrderMagicNumber()==MAGICMA)

{

if(OrderType()==OP_BUY) buys++;

if(OrderType()==OP_SELL) sells++;

}

//--- return orders volume

if(buys>0) return(buys);

else return(-sells);

}

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

//| Calculate optimal lot size |

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

double LotsOptimized()

{

double lot=Lots;

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

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

//--- select lot size

lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk/1000.0,1);

//--- calcuulate number of losses orders without a break

if(DecreaseFactor>0)

{

for(int i=orders-1;i>=0;i--)

{

if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==false)

{

Print("Error in history!");

break;

}

if(OrderSymbol()!=Symbol() || OrderType()>OP_SELL)

continue;

//---

if(OrderProfit()>0) break;

if(OrderProfit()<0) losses++;

}

if(losses>1)

lot=NormalizeDouble(lot-lot*losses/DecreaseFactor,1);

}

//--- return lot size

if(lot<0.1) lot=0.1;

return(lot);

}

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

//| Check for open order conditions |

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

void CheckForOpen()

{

double ma;

int res;

//--- go trading only for first tiks of new bar

if(Volume[0]>1) return;

//--- get Moving Average

ma=iMA(NULL,0,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0);

//--- sell conditions

if(Open[1]>ma && Close[1]<ma)

{

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

return;

}

//--- buy conditions

if(Open[1]<ma && Close[1]>ma)

{

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

return;

}

//---

}

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

//| Check for close order conditions |

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

void CheckForClose()

{

double ma;

//--- go trading only for first tiks of new bar

if(Volume[0]>1) return;

//--- get Moving Average

ma=iMA(NULL,0,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0);

//---

for(int i=0;i<OrdersTotal();i++)

{

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

if(OrderMagicNumber()!=MAGICMA || OrderSymbol()!=Symbol()) continue;

//--- check order type

if(OrderType()==OP_BUY)

{

if(Open[1]>ma && Close[1]<ma)

{

if(!OrderClose(OrderTicket(),OrderLots(),Bid,3,White))

Print("OrderClose error ",GetLastError());

}

break;

}

if(OrderType()==OP_SELL)

{

if(Open[1]<ma && Close[1]>ma)

{

if(!OrderClose(OrderTicket(),OrderLots(),Ask,3,White))

Print("OrderClose error ",GetLastError());

}

break;

}

//---

}

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

//| OnTick function |

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

void OnTick()

{

//--- check for history and trading

if(Bars<100 || IsTradeAllowed()==false)

return;

//--- calculate open orders by current symbol

if(CalculateCurrentOrders(Symbol())==0) CheckForOpen();

else CheckForClose();

//---

}

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

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