//+------------------------------------------------------------------+
//|                                                      3 Ducks.mq4 |
//|                                        Copyright © 2008, LEGRUPO |
//|                                           http://www.legrupo.com |
//|                                                     Version: 1.0 |
//| History:                                                         |
//| 1.0 => Release version to the public                             |
//+------------------------------------------------------------------+
#include <WinUser32.mqh>
#include <stderror.mqh>
#include <stdlib.mqh>

#property copyright "Copyright © 2008, LEGRUPO"
#property link      "http://www.legrupo.com"

int ExpertID = 88888888;

extern double LotSize = 0.01;
extern double TakeProfit = 100.0;

extern double StopLoss = 100.0;
extern bool useStopLoss = true;

extern int Slippage = 1;

extern bool UseMoneyManagement = true;
extern bool AccountIsMicro = true;
extern int Risk = 10; // risk in percentage % (10% of risk in this case)

extern string BuyComment = "3 Ducks BUY";
extern string SellComment = "3 Ducks SELL";

color ExitLongColor = CLR_NONE;
color ExitShortColor = CLR_NONE;

bool isBuy, isSell, isCloseBuy, isCloseSell, isSellArea, isBuyArea = false;
double sell_sl, buy_sl;
int ticket_sell, ticket_buy;

//+------------------------------------------------------------------+
//| expert initialization function                                   |
//+------------------------------------------------------------------+
int init()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| expert deinitialization function                                 |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| expert start function                                            |
//+------------------------------------------------------------------+
int start()
  {
//----
   double h4_sma60 = iMA(NULL, PERIOD_H4, 60, 0, MODE_SMA, PRICE_CLOSE,0);
   double h1_sma60 = iMA(NULL, PERIOD_H1, 60, 0, MODE_SMA, PRICE_CLOSE,0);
   double m5_sma60 = iMA(NULL, PERIOD_M5, 60, 0, MODE_SMA, PRICE_CLOSE,0);
   int MagicNumber = MakeMagicNumber();
   if(UseMoneyManagement==true) {
      LotSize = DefineLotSize(); //Adjust the lot size     total
   }
   
   double ddiff_h4 = h4_sma60 - Ask;
   double ddiff_h1 = h1_sma60 - Ask;
   double ddiff_m5 = m5_sma60 - Ask;
   int diff_h4,diff_h1,diff_m5;
   if (Digits < 4) {
      diff_h4 = (ddiff_h4) * 100;
      diff_h1 = (ddiff_h1) * 100;
      diff_m5 = (ddiff_m5) * 100;
   } else {
      diff_h4 = (ddiff_h4) * 10000;
      diff_h1 = (ddiff_h1) * 10000;
      diff_m5 = (ddiff_m5) * 10000;
   }
   int total_diff = diff_h4+diff_h1+diff_m5;
   Comment("Diff-H4: ", diff_h4, "\nDiff-H1: ",diff_h1,"\nDiff-M5: ",diff_m5,"\n\nTotal diffs: ",total_diff);
   //return(0);
   //Comment("H4: ", h4_sma60, "\nH1: ",h1_sma60,"\nM5: ",m5_sma60);
   if (Bid < h4_sma60 && Bid < h1_sma60 && Bid < m5_sma60) {
      Comment("Price bellow SMA(60)");
      if (CountShorts(MagicNumber) == 0 && total_diff < 40) {
         CloseLongs(MagicNumber);
         double sell_price = Bid;
         if (useStopLoss) {
            sell_sl = sell_price+StopLoss*Point;
         } else {
            sell_sl = 0;
         }
         ticket_sell=OrderSend(Symbol(),OP_SELL,LotSize,sell_price,Slippage,sell_sl,sell_price-TakeProfit*Point,SellComment,MagicNumber,0,CLR_NONE);
         if(ticket_sell<0)
         {
            Alert(Symbol()," 3 Ducks SELL OrderSend failed with error #",ErrorDescription(GetLastError()));
            //return(0);
         }
      }
   } else {
      //CloseShorts(MagicNumber);
   }
   
   if (Ask > h4_sma60 && Ask > h1_sma60 && Ask > m5_sma60) {
      Comment("Price above SMA(60)");
      if (CountLongs(MagicNumber) == 0 && total_diff < 40) {
         CloseShorts(MagicNumber);
         double buy_price = Ask;
         if (useStopLoss) {
            buy_sl = buy_price-StopLoss*Point;
         } else {
            buy_sl = 0;
         }
         ticket_buy=OrderSend(Symbol(),OP_BUY,LotSize,buy_price,Slippage,buy_sl,buy_price+TakeProfit*Point,BuyComment,MagicNumber,0,CLR_NONE);
         if(ticket_buy<0)
         {
            Alert(Symbol()," 3 Ducks BUY OrderSend failed with error #",ErrorDescription(GetLastError()));
            //return(0);
         }
      }
   } else {
      //CloseLongs(MagicNumber);
   }
//----
   return(0);
  }

//+------------------------------------------------------------------+
//+------------------------------------------------------------------+
//| Make Magic Number                                                |
//+------------------------------------------------------------------+
int MakeMagicNumber()
{
   int SymbolCode  = 0;
   int PeriodCode  = 0;
   int MagicNumber = 0; 
   
   //---- Symbol Code
        if( Symbol() == "AUDCAD" || Symbol() == "AUDCADm" ) { SymbolCode = 1000; }
   else if( Symbol() == "AUDJPY" || Symbol() == "AUDJPYm" ) { SymbolCode = 2000; }
   else if( Symbol() == "AUDNZD" || Symbol() == "AUDNZDm" ) { SymbolCode = 3000; }
   else if( Symbol() == "AUDUSD" || Symbol() == "AUDUSDm" ) { SymbolCode = 4000; }
   else if( Symbol() == "CHFJPY" || Symbol() == "CHFJPYm" ) { SymbolCode = 5000; }
   else if( Symbol() == "EURAUD" || Symbol() == "EURAUDm" ) { SymbolCode = 6000; }
   else if( Symbol() == "EURCAD" || Symbol() == "EURCADm" ) { SymbolCode = 7000; }
   else if( Symbol() == "EURCHF" || Symbol() == "EURCHFm" ) { SymbolCode = 8000; }
   else if( Symbol() == "EURGBP" || Symbol() == "EURGBPm" ) { SymbolCode = 9000; }
   else if( Symbol() == "EURJPY" || Symbol() == "EURJPYm" ) { SymbolCode = 1000; }
   else if( Symbol() == "EURUSD" || Symbol() == "EURUSDm" ) { SymbolCode = 1100; }
   else if( Symbol() == "GBPCHF" || Symbol() == "GBPCHFm" ) { SymbolCode = 1200; }
   else if( Symbol() == "GBPJPY" || Symbol() == "GBPJPYm" ) { SymbolCode = 1300; }
   else if( Symbol() == "GBPUSD" || Symbol() == "GBPUSDm" ) { SymbolCode = 1400; }
   else if( Symbol() == "NZDJPY" || Symbol() == "NZDJPYm" ) { SymbolCode = 1500; }
   else if( Symbol() == "NZDUSD" || Symbol() == "NZDUSDm" ) { SymbolCode = 1600; }
   else if( Symbol() == "USDCAD" || Symbol() == "USDCADm" ) { SymbolCode = 1700; }
   else if( Symbol() == "USDCHF" || Symbol() == "USDCHFm" ) { SymbolCode = 1800; }
   else if( Symbol() == "USDJPY" || Symbol() == "USDJPYm" ) { SymbolCode = 1900; }
                     
   //---- Calculate MagicNumber
   MagicNumber = ExpertID+SymbolCode;
   return(MagicNumber);
}

//+------------------------------------------------------------------+
//| Calculate concurrent Long position                               |
//+------------------------------------------------------------------+
int CountLongs(int MagicNumber)
{
 int count=0;
 int trade;
 int trades=OrdersTotal();
 for(trade=0;trade<trades;trade++)
 {
  OrderSelect(trade,SELECT_BY_POS,MODE_TRADES);
  
  if( OrderSymbol()!=Symbol() || OrderMagicNumber() != MagicNumber )
   continue;
   
  if(OrderType()==OP_BUY || OrderType()==OP_BUYSTOP || OrderType()==OP_BUYLIMIT)
   count++;
 }//for
 return(count);
}
//+------------------------------------------------------------------+
//| Calculate concurrent short position                              |
//+------------------------------------------------------------------+
int CountShorts(int MagicNumber)
{
 int count=0;
 int trade;
 int trades=OrdersTotal();
 for(trade=0;trade<trades;trade++)
 {
  OrderSelect(trade,SELECT_BY_POS,MODE_TRADES);
  
  if(OrderSymbol()!=Symbol() || OrderMagicNumber() != MagicNumber )
   continue;
   
  if(OrderType()==OP_SELL || OrderType()==OP_SELLSTOP || OrderType()==OP_SELLLIMIT)
  count++;
 }//for
 return(count);
}
//+------------------------------------------------------------------+
//| Close Long Position                                              |
//+------------------------------------------------------------------+
void CloseLongs(int MagicNumber)
{
 int i = OrdersTotal();
 
 while( CountLongs(MagicNumber) != 0 && i >= 0 )
 {  
   OrderSelect(i,SELECT_BY_POS,MODE_TRADES);
   
   if( OrderSymbol() != Symbol() || OrderMagicNumber() != MagicNumber )
   {
     i--;
     continue;
   }
   else if(OrderType()==OP_BUY || OrderType()== OP_BUYLIMIT)
   {
     OrderClose(OrderTicket(),OrderLots(),Bid,Slippage,ExitLongColor);
     i--;
   }
 }
}
//+------------------------------------------------------------------+
//| Close Short Position                                             |
//+------------------------------------------------------------------+
void CloseShorts(int MagicNumber)
{
 int i = OrdersTotal();
 
 while( CountShorts(MagicNumber) != 0 && i >= 0 )
 {  
   OrderSelect(i,SELECT_BY_POS,MODE_TRADES);
   
   if( OrderSymbol() != Symbol() || OrderMagicNumber() != MagicNumber)
   {
     i--;
     continue;
   }
   else if(OrderType()== OP_SELL || OrderType()==OP_SELLLIMIT )
  {
   OrderClose(OrderTicket(),OrderLots(),Ask,Slippage,ExitShortColor);
  }
 }
}

double DefineLotSize() {
   double lotMM = MathCeil(AccountFreeMargin() *  Risk / 1000) / 100;
   if(AccountIsMicro==false) { //normal account
      if (lotMM < 0.1) lotMM = LotSize;
      if ((lotMM > 0.5) && (lotMM < 1)) lotMM=0.5;
      if (lotMM > 1.0) lotMM = MathCeil(lotMM);
      if  (lotMM > 100) lotMM = 100;
   } else { //micro account
      if (lotMM < 0.01) lotMM = LotSize;
      if (lotMM > 1.0) lotMM = MathCeil(lotMM);
      if  (lotMM > 100) lotMM = 100;
   }
   return (lotMM);
}