//+------------------------------------------------------------------+
//|                                            Udy Ivan Madumere.mq4 |
//|                      Copyright © 2010, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"

int TakeProfit_L = 39; // Take Profit in points
 int StopLoss_L = 147;  // Stop Loss in points
 int TakeProfit_S = 200; // Take Profit in points
 int StopLoss_S = 267;  // Stop Loss in points
 int TradeTime=18;      // Time to enter the market
 int t1=6;              
 int t2=2;                
 int delta_L=6;         
 int delta_S=21; 
 int TrailingStop  = 30;    
extern double lot = 0.01;      // Lot size
 int Orders=1;          // maximal number of positions opened at a time }
 int MaxOpenTime=504;
 int BigLotSize = 1;    // By how much lot size is multiplicated in Big lot
 bool AutoLot=true;

int ticket,total,cnt;
bool cantrade=true;
double closeprice;
double tmp;

int LotSize()
// The function opens a short position with lot size=volume
{
if (AccountBalance()>=50) lot=0.02;
if (AccountBalance()>=100) lot=0.04;
if (AccountBalance()>=200) lot=0.08;
if (AccountBalance()>=300) lot=0.12;
if (AccountBalance()>=400) lot=0.16;
if (AccountBalance()>=500) lot=0.2;
if (AccountBalance()>=600) lot=0.24;
if (AccountBalance()>=700) lot=0.28;
if (AccountBalance()>=800) lot=0.32;
if (AccountBalance()>=900) lot=0.36;
if (AccountBalance()>=1000) lot=0.4;
if (AccountBalance()>=1500) lot=0.6;
if (AccountBalance()>=2000) lot=0.8;
if (AccountBalance()>=2500) lot=1.0;
if (AccountBalance()>=3000) lot=1.2;
if (AccountBalance()>=3500) lot=1.4;
if (AccountBalance()>=4000) lot=1.6;
if (AccountBalance()>=4500) lot=1.8;
if (AccountBalance()>=5000) lot=2.0;
if (AccountBalance()>=5500) lot=2.2;
if (AccountBalance()>=6000) lot=2.4;
if (AccountBalance()>=7000) lot=2.8;
if (AccountBalance()>=8000) lot=3.2;
if (AccountBalance()>=9000) lot=3.6;
if (AccountBalance()>=10000) lot=4.0;
if (AccountBalance()>=15000) lot=6.0;
if (AccountBalance()>=20000) lot=8.0;
if (AccountBalance()>=30000) lot=12;
if (AccountBalance()>=40000) lot=16;
if (AccountBalance()>=50000) lot=20;
if (AccountBalance()>=60000) lot=24;
if (AccountBalance()>=70000) lot=28;
if (AccountBalance()>=80000) lot=32;
if (AccountBalance()>=90000) lot=36;
if (AccountBalance()>=100000) lot=40;
if (AccountBalance()>=200000) lot=80;
}

int globPos()
// the function calculates big lot size
{
int v1=GlobalVariableGet("globalPosic");
GlobalVariableSet("globalPosic",v1+1);
  return(0);
}

int OpenLong(double volume=0.1)
// the function opens a long position with lot size=volume 
{
  int slippage=10;
  string comment="20/200 expert v2 (Long)";
  color arrow_color=Red;
  int magic=0;

    if (GlobalVariableGet("globalBalans")>AccountBalance()) volume=lot*BigLotSize;
  //  if (GlobalVariableGet("globalBalans")>AccountBalance()) if (AutoLot) LotSize();
   
  ticket=OrderSend(Symbol(),OP_BUY,volume,Ask,slippage,Ask-StopLoss_L*Point,
                      Ask+TakeProfit_L*Point,comment,magic,0,arrow_color);
 
  GlobalVariableSet("globalBalans",AccountBalance());                    
  globPos();
//  if (GlobalVariableGet("globalPosic")>25)
//  {
  GlobalVariableSet("globalPosic",0);
  if (AutoLot) LotSize();
//  }
 
  if(ticket>0)
  {
    if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES))
    {
      return(0);
    }
    else
      {
        Print("OpenLong(),OrderSelect() - returned an error : ",GetLastError()); 
        return(-1);
      }   
  }
  else 
  {
    Print("Error opening Buy order : ",GetLastError()); 
    return(-1);
  }
}
  
int OpenShort(double volume=0.1)
// The function opens a short position with lot size=volume
{
  int slippage=10;
  string comment="20/200 expert v2 (Short)";
  color arrow_color=Red;
  int magic=0;  

  if (GlobalVariableGet("globalBalans")>AccountBalance()) volume=lot*BigLotSize;
   
  ticket=OrderSend(Symbol(),OP_SELL,volume,Bid,slippage,Bid+StopLoss_S*Point,
                      Bid-TakeProfit_S*Point,comment,magic,0,arrow_color);
  GlobalVariableSet("globalBalans",AccountBalance());
  globPos();
//  if (GlobalVariableGet("globalPosic")>25)
//  {
  GlobalVariableSet("globalPosic",0);
  if (AutoLot) LotSize();
//  }

  if(ticket>0)
  {
    if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES))
      {
        return(0);
      }
    else
      {
        Print("OpenShort(),OrderSelect() - returned an error : ",GetLastError()); 
        return(-1);
      }    
  }
  else 
  {
    Print("Error opening Sell order : ",GetLastError()); 
    return(-1);
  }
}

int init()
{
  // control of a variable before using
  if (AutoLot) LotSize();
  if(!GlobalVariableCheck("globalBalans"))
    GlobalVariableSet("globalBalans",AccountBalance());
  if(!GlobalVariableCheck("globalPosic"))
    GlobalVariableSet("globalPosic",0);
  return(0);
}

int deinit()
{   
  return(0);
}


int start()
{
  if((TimeHour(TimeCurrent())>TradeTime)) cantrade=true;  
  // check if there are open orders ...
  total=OrdersTotal();
  if(total<Orders)
  {
    // ... if no open orders, go further
    // check if it's time for trade
    if((TimeHour(TimeCurrent())==TradeTime)&&(cantrade))
    {
      // ... if it is
      if (((Open[t1]-Open[t2])>delta_S*Point)) //if it is
      {
        //condition is fulfilled, enter a short position:
        // check if there is free money for opening a short position
        if(AccountFreeMarginCheck(Symbol(),OP_SELL,lot)<=0 || GetLastError()==134)
        {
          Print("Not enough money");
          return(0);
        }
        OpenShort(lot);
        
        cantrade=false; //prohibit repeated trade until the next bar
        return(0);
      }
      if (((Open[t2]-Open[t1])>delta_L*Point)) //if the price increased by delta
      {
        // condition is fulfilled, enter a long position
        // check if there is free money
        if(AccountFreeMarginCheck(Symbol(),OP_BUY,lot)<=0 || GetLastError()==134)
        {
          Print("Not enough money");
          return(0);
        }
        OpenLong(lot);
        
        cantrade=false;
        return(0);
      }
    }
  }


    //Manage open orders
         //move TrailingStop if profit>TS
            
            if(OrderType()==OP_SELL) 
            {
               if(OrderOpenPrice()-Ask>TrailingStop*Point && OrderStopLoss()>Ask+TrailingStop*Point)
              {
                  OrderModify(OrderTicket(),OrderOpenPrice(),Ask+TrailingStop*Point,0,0, Red);
              }           
           }

// block of a trade validity time checking, if MaxOpenTime=0, do not check.
   if(MaxOpenTime>0)
   {
      for(cnt=0;cnt<total;cnt++)
      {
         if (OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES))
         {
            tmp = (TimeCurrent()-OrderOpenTime())/3600.0;
               if (((NormalizeDouble(tmp,8)-MaxOpenTime)>=0))
               {     
                  RefreshRates();
                  if (OrderType()==OP_BUY)
                     closeprice=Bid;
                  else  
                     closeprice=Ask;          
                  if (OrderClose(OrderTicket(),OrderLots(),closeprice,10,Green))
                  {
                  Print("Forced closing of the trade - ¹",OrderTicket());
                     OrderPrint();
                  }
                  else 
                     Print("OrderClose() in block of a trade validity time checking returned an error - ",GetLastError());        
                  } 
               }
               else 
                  Print("OrderSelect() in block of a trade validity time checking returned an error - ",GetLastError());
         } 
      }     
      return(0);
   }