//+------------------------------------------------------------------+
//|                                                      Starter.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"
#define MAGICMA  20050610

extern double Lots               = 1;
extern double MaximumRisk        = 0.03;
extern double DecreaseFactor     = 3;
extern double IncreaseFactor     = 3;
//extern double Lots = 4;
extern double Stop = 10;
extern double MAPeriod=120;
double spread=1.5;
//+-- extern double JuiceLevel = 0.0005;

//+------------------------------------------------------------------+
//| expert initialization function                                   |
//+------------------------------------------------------------------+
int init()
  {
//---- 
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| expert deinitialization function                                 |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 
   
//----
   return(0);
  }
 
//+------------------------------------------------------------------+
//| 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
   int    wines=0;                  // number of wines orders without a break
   int    i;
//---- select lot size
   lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk/1000,1);
//---- calcuulate number of losses orders without a break
   if(DecreaseFactor>0)
     {
      for(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);
     }
   if((IncreaseFactor>0) && (losses<1))
     {
      for(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) wines++;
        }
      if(wines>1) lot=NormalizeDouble(lot-lot*wines/IncreaseFactor,1);
     }
//---- return lot size
   if(lot<0.1) lot=0.1;
//   lot=1;
   return(lot);
  }  
  
//+------------------------------------------------------------------+
//| expert start function                                            |
//+------------------------------------------------------------------+
int start()
  {
   double Laguerre;
   double Alpha;
   double MA, MAprevious;
   
//+--   double Juice;
   int cnt, ticket, total;
  
  Laguerre=iCustom(NULL, 0, "Laguerre", 0, 0);
  Alpha=iCCI(NULL, 0, 14, PRICE_CLOSE, 0);
  MA=iMA(NULL,0,MAPeriod,0,MODE_EMA,PRICE_MEDIAN,0);
  MAprevious=iMA(NULL,0,MAPeriod,0,MODE_EMA,PRICE_MEDIAN,1);
//+--  Juice=iCustom(NULL,0,"Juice",0,0);

   total=OrdersTotal();  
   bool est_s=true;
   bool est_b=true;
   for(cnt=0;cnt<total;cnt++)
     {
       OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
       if((OrderType()==OP_SELL) && (OrderSymbol()==Symbol())) est_s=false;
       if((OrderType()==OP_BUY) && (OrderSymbol()==Symbol())) est_b=false;
     }
//   if(total<1) 
     {
      // no opened orders identified
      if(AccountFreeMargin()<(1000*Lots))
        {
         Print("We have no money. Free Margin = ", AccountFreeMargin());
         return(0);  
        }
      // check for long position (BUY) possibility
      if((Laguerre<=0) && (MA>MAprevious) && (Alpha<-5) && est_b) //+-- && Juice>JuiceLevel)
        {
        ticket=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,0,"starter",16384,0,Green);
        }
      // check for short position (SELL) possibility
      if((Laguerre>=1) && (MA<MAprevious) && (Alpha>5) && est_s) //+-- && Juice>JuiceLevel)
        {
         ticket=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,0,"starter",16384,0,Red);
        } 
     }
// it is important to enter the market correctly, 
   // but it is more important to exit it correctly...   
   for(cnt=0;cnt<total;cnt++)
     {
      OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
      if(OrderType()<=OP_SELL &&   // check for opened position 
         OrderSymbol()==Symbol())  // check for symbol
        {
         if(OrderType()==OP_BUY)   // long position is opened
           {
            // should it be closed?
            if(Laguerre>0.9)
                {
                 OrderClose(OrderTicket(),OrderLots(),Bid,3,Violet); // close position
                 return(0); // exit
                }
            // check for stop
            if(Stop>0)  
              {                 
               if(Bid-OrderOpenPrice()>Point*Stop)
                 {
                   OrderClose(OrderTicket(),OrderLots(),Bid,3,Violet); // close position
                   return(0);
                 }
              }
           }
         else // go to short position
           {
            // should it be closed?
            if(Laguerre<0.1)
              {
               OrderClose(OrderTicket(),OrderLots(),Ask,3,Violet); // close position
               return(0); // exit
              }
            // check for stop
            if(Stop>0)  
              {                 
               if(OrderOpenPrice()-Ask>Point*Stop)
                 {
                   OrderClose(OrderTicket(),OrderLots(),Ask,3,Violet); // close position
                   return(0);
                 }
              }
           }
        }
     }
     
   return(0);
  }
// the end.