Parabolic SAR EA

ÿþ//+------------------------------------------------------------------+

//|                    Parabolic SAR EA(barabashkakvn's edition).mq5 |

//|                     Copyright © 2011, Victor Lukashuk aka lukas1 |

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

#property copyright "Copyright © 2011, Victor Lukashuk aka lukas1"

#property version   "1.000"

/* !>25B=8: B>@3C5B ?> 8=48:0B>@C Parabolic. 

   A?>;L7C5BAO @0AG5B 40==KE 8=48:0B>@0 =0 C65 ?@>H54H5< 10@5 (Ind_Bar=1).

   ====     >:C?:0, B>;L:> >4=0 ?>78F8O:     ====

 1. =48:0B>@ =0G0; @8A>20BL ;8=8N =865 F5=K.

    =0G5=85 1CD5@0 8=48:0B>@0 =0 7040==>< 10@5 =865 F5=K.

   ====     @>4060, B>;L:> >4=0 ?>78F8O:     ====

 1. =48:0B>@ =0G0; @8A>20BL ;8=8N 2KH5 F5=K.

    =0G5=85 1CD5@0 8=48:0B>@0 =0 7040==>< 10@5 2KH5 F5=K.

   ====     KE>4 87 ?>78F88:               ====

 1. !@010BK20=85  StopLoss, TakeProfit.

 2. > A83=0;C ?@8 ?5@5:;NG5=88 ;8=88.   

*/

//---

#include <Trade\PositionInfo.mqh>

#include <Trade\Trade.mqh>

#include <Trade\SymbolInfo.mqh>  

#include <Trade\AccountInfo.mqh>

CPositionInfo  m_position;                   // trade position object

CTrade         m_trade;                      // trading object

CSymbolInfo    m_symbol;                     // symbol info object

CAccountInfo   m_account;                    // account info wrapper

//--- input parameters

input double   InpLots           = 1.0;      // Lots

input ushort   InpStopLoss       = 50;       // Stop Loss, in pips (1.00045-1.00055=1 pips)

input ushort   InpTakeProfit     = 50;       // Take Profit, in pips (1.00045-1.00055=1 pips)

input ENUM_TIMEFRAMES Inp_timeframe=PERIOD_M30; // Work timeframe 

input double   Inp_SAR_step      = 0.02;     // SAR: price increment step - acceleration factor 

input double   Inp_SAR_maximum   = 0.2;      // SAR: maximum value of step 

input int      InpBarCurrent     = 1;        // Bar current

input ulong    m_magic=82139559;             // magic number

//---

ulong m_slippage=10;                         // slippage



double ExtStopLoss=0.0;

double ExtTakeProfit=0.0;

int    handle_iSAR;                          // variable for storing the handle of the iSAR indicator 

double m_adjusted_point;                     // point value adjusted for 3 or 5 points

bool   m_need_open_buy=false;

bool   m_need_open_sell=false;

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

//| Expert initialization function                                   |

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

int OnInit()

  {

//---

   if(!m_symbol.Name(Symbol())) // sets symbol name

      return(INIT_FAILED);

   RefreshRates();

//---

   m_trade.SetExpertMagicNumber(m_magic);

   m_trade.SetMarginMode();

   m_trade.SetTypeFillingBySymbol(m_symbol.Name());

   m_trade.SetDeviationInPoints(m_slippage);

//--- tuning for 3 or 5 digits

   int digits_adjust=1;

   if(m_symbol.Digits()==3 || m_symbol.Digits()==5)

      digits_adjust=10;

   m_adjusted_point=m_symbol.Point()*digits_adjust;



   ExtStopLoss       = InpStopLoss        * m_adjusted_point;

   ExtTakeProfit     = InpTakeProfit      * m_adjusted_point;

//--- check the input parameter "Lots"

   string err_text="";

   if(!CheckVolumeValue(InpLots,err_text))

     {

      //--- when testing, we will only output to the log about incorrect input parameters

      if(MQLInfoInteger(MQL_TESTER))

        {

         Print(__FUNCTION__,", ERROR: ",err_text);

         return(INIT_FAILED);

        }

      else // if the Expert Advisor is run on the chart, tell the user about the error

        {

         Alert(__FUNCTION__,", ERROR: ",err_text);

         return(INIT_PARAMETERS_INCORRECT);

        }

     }

//--- create handle of the indicator iSAR

   handle_iSAR=iSAR(m_symbol.Name(),Period(),Inp_SAR_step,Inp_SAR_maximum);

//--- if the handle is not created 

   if(handle_iSAR==INVALID_HANDLE)

     {

      //--- tell about the failure and output the error code 

      PrintFormat("Failed to create handle of the iSAR indicator for the symbol %s/%s, error code %d",

                  m_symbol.Name(),

                  EnumToString(Period()),

                  GetLastError());

      //--- the indicator is stopped early 

      return(INIT_FAILED);

     }

//---

   return(INIT_SUCCEEDED);

  }

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

//| Expert deinitialization function                                 |

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

void OnDeinit(const int reason)

  {

//---



  }

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

//| Expert tick function                                             |

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

void OnTick()

  {

   if(m_need_open_buy)

     {

      int count_buys=0,count_sells=0;

      CalculateAllPositions(count_buys,count_sells);

      if(count_sells!=0)

        {

         ClosePosition(POSITION_TYPE_SELL); return;

        }

      else

         m_need_open_sell=false;

      if(count_buys!=0)

        {

         m_need_open_buy=false; return;

        }

      else

        {

         OpenPosition(POSITION_TYPE_BUY);

         return;

        }

     }

   if(m_need_open_sell)

     {

      int count_buys=0,count_sells=0;

      CalculateAllPositions(count_buys,count_sells);

      if(count_buys!=0)

        {

         ClosePosition(POSITION_TYPE_BUY); return;

        }

      else

         m_need_open_buy=false;

      if(count_sells!=0)

        {

         m_need_open_sell=false; return;

        }

      else

        {

         OpenPosition(POSITION_TYPE_SELL);

         return;

        }

     }

//--- we work only at the time of the birth of new bar

   static datetime PrevBars=0;

   datetime time_0=iTime(m_symbol.Name(),Inp_timeframe,0);

   if(time_0==PrevBars)

      return;

   PrevBars=time_0;

   if(!RefreshRates())

     {

      PrevBars=0;

      return;

     }

//---

   int count_buys=0,count_sells=0;

   CalculateAllPositions(count_buys,count_sells);

   if(count_buys+count_sells>1)

     {

      Print("ERROR! Buy: ",count_buys,", Sell: ",count_sells,". Close All");

      CloseAllPositions();

      PrevBars=0; return;

     }

//---

   double sar[];

   ArraySetAsSeries(sar,true);

   int buffer=0,start_pos=0,count=InpBarCurrent+1;

   if(!iGetArray(handle_iSAR,buffer,start_pos,count,sar))

     {

      PrevBars=0; return;

     }

   MqlRates rates[];

   ArraySetAsSeries(rates,true);

   if(CopyRates(m_symbol.Name(),Inp_timeframe,start_pos,count,rates)!=count)

     {

      PrevBars=0; return;

     }

//--- check signal open BUY

   if(sar[InpBarCurrent]<rates[InpBarCurrent].low)

     {

      m_need_open_buy   = true;

      m_need_open_sell  = false;

      return;

     }

//--- check signal open SELL

   if(sar[InpBarCurrent]>rates[InpBarCurrent].high)

     {

      m_need_open_buy   = false;

      m_need_open_sell  = true;

      return;

     }

  }

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

//| TradeTransaction function                                        |

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

void OnTradeTransaction(const MqlTradeTransaction &trans,

                        const MqlTradeRequest &request,

                        const MqlTradeResult &result)

  {

//---



  }

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

//| Refreshes the symbol quotes data                                 |

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

bool RefreshRates(void)

  {

//--- refresh rates

   if(!m_symbol.RefreshRates())

     {

      Print("RefreshRates error");

      return(false);

     }

//--- protection against the return value of "zero"

   if(m_symbol.Ask()==0 || m_symbol.Bid()==0)

      return(false);

//---

   return(true);

  }

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

//| Check the correctness of the position volume                     |

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

bool CheckVolumeValue(double volume,string &error_description)

  {

//--- minimal allowed volume for trade operations

   double min_volume=m_symbol.LotsMin();

   if(volume<min_volume)

     {

      if(TerminalInfoString(TERMINAL_LANGUAGE)=="Russian")

         error_description=StringFormat("1J5< <5=LH5 <8=8<0;L=> 4>?CAB8<>3> SYMBOL_VOLUME_MIN=%.2f",min_volume);

      else

         error_description=StringFormat("Volume is less than the minimal allowed SYMBOL_VOLUME_MIN=%.2f",min_volume);

      return(false);

     }

//--- maximal allowed volume of trade operations

   double max_volume=m_symbol.LotsMax();

   if(volume>max_volume)

     {

      if(TerminalInfoString(TERMINAL_LANGUAGE)=="Russian")

         error_description=StringFormat("1J5< 1>;LH5 <0:A8<0;L=> 4>?CAB8<>3> SYMBOL_VOLUME_MAX=%.2f",max_volume);

      else

         error_description=StringFormat("Volume is greater than the maximal allowed SYMBOL_VOLUME_MAX=%.2f",max_volume);

      return(false);

     }

//--- get minimal step of volume changing

   double volume_step=m_symbol.LotsStep();

   int ratio=(int)MathRound(volume/volume_step);

   if(MathAbs(ratio*volume_step-volume)>0.0000001)

     {

      if(TerminalInfoString(TERMINAL_LANGUAGE)=="Russian")

         error_description=StringFormat("1J5< =5 :@0B5= <8=8<0;L=><C H03C SYMBOL_VOLUME_STEP=%.2f, 1;8609H89 ?@028;L=K9 >1J5< %.2f",

                                        volume_step,ratio*volume_step);

      else

         error_description=StringFormat("Volume is not a multiple of the minimal step SYMBOL_VOLUME_STEP=%.2f, the closest correct volume is %.2f",

                                        volume_step,ratio*volume_step);

      return(false);

     }

   error_description="Correct volume value";

   return(true);

  }

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

//| Calculate all positions Buy and Sell                             |

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

void CalculateAllPositions(int &count_buys,int &count_sells)

  {

   count_buys=0;

   count_sells=0;



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

      if(m_position.SelectByIndex(i)) // selects the position by index for further access to its properties

         if(m_position.Symbol()==m_symbol.Name() && m_position.Magic()==m_magic)

           {

            if(m_position.PositionType()==POSITION_TYPE_BUY)

               count_buys++;



            if(m_position.PositionType()==POSITION_TYPE_SELL)

               count_sells++;

           }

//---

   return;

  }

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

//| Close all positions                                              |

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

void CloseAllPositions()

  {

   for(int i=PositionsTotal()-1;i>=0;i--) // returns the number of current positions

      if(m_position.SelectByIndex(i))     // selects the position by index for further access to its properties

         if(m_position.Symbol()==m_symbol.Name() && m_position.Magic()==m_magic)

            m_trade.PositionClose(m_position.Ticket()); // close a position by the specified symbol

  }

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

//| Close positions                                                  |

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

void ClosePosition(const ENUM_POSITION_TYPE pos_type)

  {

   for(int i=PositionsTotal()-1;i>=0;i--) // returns the number of current positions

      if(m_position.SelectByIndex(i))     // selects the position by index for further access to its properties

         if(m_position.Symbol()==m_symbol.Name() && m_position.Magic()==m_magic)

            if(m_position.PositionType()==pos_type) // gets the position type

               m_trade.PositionClose(m_position.Ticket()); // close a position by the specified symbol

  }

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

//| Get value of buffers                                             |

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

double iGetArray(const int handle,const int buffer,const int start_pos,const int count,double &arr_buffer[])

  {

   bool result=true;

   if(!ArrayIsDynamic(arr_buffer))

     {

      Print("This a no dynamic array!");

      return(false);

     }

   ArrayFree(arr_buffer);

//--- reset error code 

   ResetLastError();

//--- fill a part of the iBands array with values from the indicator buffer

   int copied=CopyBuffer(handle,buffer,start_pos,count,arr_buffer);

   if(copied!=count)

     {

      //--- if the copying fails, tell the error code 

      PrintFormat("Failed to copy data from the indicator, error code %d",GetLastError());

      //--- quit with zero result - it means that the indicator is considered as not calculated 

      return(false);

     }

   return(result);

  }

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

//| Open positions                                                   |

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

void OpenPosition(const ENUM_POSITION_TYPE pos_type)

  {

//--- check Freeze and Stops levels

/*

   Type of order/position  |  Activation price  |  Check

   ------------------------|--------------------|--------------------------------------------

   Buy Limit order         |  Ask               |  Ask-OpenPrice  >= SYMBOL_TRADE_FREEZE_LEVEL

   Buy Stop order          |  Ask	            |  OpenPrice-Ask  >= SYMBOL_TRADE_FREEZE_LEVEL

   Sell Limit order        |  Bid	            |  OpenPrice-Bid  >= SYMBOL_TRADE_FREEZE_LEVEL

   Sell Stop order	      |  Bid	            |  Bid-OpenPrice  >= SYMBOL_TRADE_FREEZE_LEVEL

   Buy position            |  Bid	            |  TakeProfit-Bid >= SYMBOL_TRADE_FREEZE_LEVEL 

                           |                    |  Bid-StopLoss   >= SYMBOL_TRADE_FREEZE_LEVEL

   Sell position           |  Ask	            |  Ask-TakeProfit >= SYMBOL_TRADE_FREEZE_LEVEL

                           |                    |  StopLoss-Ask   >= SYMBOL_TRADE_FREEZE_LEVEL

                           

   Buying is done at the Ask price                 |  Selling is done at the Bid price

   ------------------------------------------------|----------------------------------

   TakeProfit        >= Bid                        |  TakeProfit        <= Ask

   StopLoss          <= Bid	                     |  StopLoss          >= Ask

   TakeProfit - Bid  >= SYMBOL_TRADE_STOPS_LEVEL   |  Ask - TakeProfit  >= SYMBOL_TRADE_STOPS_LEVEL

   Bid - StopLoss    >= SYMBOL_TRADE_STOPS_LEVEL   |  StopLoss - Ask    >= SYMBOL_TRADE_STOPS_LEVEL

*/

   if(!RefreshRates() || !m_symbol.Refresh())

      return;

//--- FreezeLevel -> for pending order and modification

   double freeze_level=m_symbol.FreezeLevel()*m_symbol.Point();

   if(freeze_level==0.0)

      freeze_level=(m_symbol.Ask()-m_symbol.Bid())*3.0;

   freeze_level*=1.1;

//--- StopsLevel -> for TakeProfit and StopLoss

   double stop_level=m_symbol.StopsLevel()*m_symbol.Point();

   if(stop_level==0.0)

      stop_level=(m_symbol.Ask()-m_symbol.Bid())*3.0;

   stop_level*=1.1;



   if(freeze_level<=0.0 || stop_level<=0.0)

      return;

//---

   if(pos_type==POSITION_TYPE_BUY)

     {

      double price=m_symbol.Ask();

      double sl=(InpStopLoss==0)?0.0:price-ExtStopLoss;

      double tp=(InpTakeProfit==0)?0.0:price+ExtTakeProfit;

      if(((sl!=0 && ExtStopLoss>=stop_level) || sl==0.0) && ((tp!=0 && ExtTakeProfit>=stop_level) || tp==0.0))

        {

         OpenBuy(sl,tp);

         return;

        }

     }

   if(pos_type==POSITION_TYPE_SELL)

     {

      double price=m_symbol.Bid();

      double sl=(InpStopLoss==0)?0.0:price+ExtStopLoss;

      double tp=(InpTakeProfit==0)?0.0:price-ExtTakeProfit;

      if(((sl!=0 && ExtStopLoss>=stop_level) || sl==0.0) && ((tp!=0 && ExtTakeProfit>=stop_level) || tp==0.0))

        {

         OpenSell(sl,tp);

         return;

        }

     }

  }

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

//| Open Buy position                                                |

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

void OpenBuy(double sl,double tp)

  {

   sl=m_symbol.NormalizePrice(sl);

   tp=m_symbol.NormalizePrice(tp);



   double long_lot=InpLots;

//--- check volume before OrderSend to avoid "not enough money" error (CTrade)

   double free_margin_check= m_account.FreeMarginCheck(m_symbol.Name(),ORDER_TYPE_BUY,long_lot,m_symbol.Ask());

   double margin_check     = m_account.MarginCheck(m_symbol.Name(),ORDER_TYPE_SELL,long_lot,m_symbol.Bid());

   if(free_margin_check>margin_check)

     {

      if(m_trade.Buy(long_lot,m_symbol.Name(),m_symbol.Ask(),sl,tp))

        {

         if(m_trade.ResultDeal()==0)

           {

            Print("#1 Buy -> false. Result Retcode: ",m_trade.ResultRetcode(),

                  ", description of result: ",m_trade.ResultRetcodeDescription());

            PrintResultTrade(m_trade,m_symbol);

           }

         else

           {

            Print("#2 Buy -> true. Result Retcode: ",m_trade.ResultRetcode(),

                  ", description of result: ",m_trade.ResultRetcodeDescription());

            PrintResultTrade(m_trade,m_symbol);

           }

        }

      else

        {

         Print("#3 Buy -> false. Result Retcode: ",m_trade.ResultRetcode(),

               ", description of result: ",m_trade.ResultRetcodeDescription());

         PrintResultTrade(m_trade,m_symbol);

        }

     }

   else

     {

      Print(__FUNCTION__,", ERROR: method CAccountInfo::FreeMarginCheck returned the value ",DoubleToString(free_margin_check,2));

      return;

     }

//---

  }

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

//| Open Sell position                                               |

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

void OpenSell(double sl,double tp)

  {

   sl=m_symbol.NormalizePrice(sl);

   tp=m_symbol.NormalizePrice(tp);



   double short_lot=InpLots;

//--- check volume before OrderSend to avoid "not enough money" error (CTrade)

   double free_margin_check= m_account.FreeMarginCheck(m_symbol.Name(),ORDER_TYPE_SELL,short_lot,m_symbol.Bid());

   double margin_check     = m_account.MarginCheck(m_symbol.Name(),ORDER_TYPE_SELL,short_lot,m_symbol.Bid());

   if(free_margin_check>margin_check)

     {

      if(m_trade.Sell(short_lot,m_symbol.Name(),m_symbol.Bid(),sl,tp))

        {

         if(m_trade.ResultDeal()==0)

           {

            Print("#1 Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),

                  ", description of result: ",m_trade.ResultRetcodeDescription());

            PrintResultTrade(m_trade,m_symbol);

           }

         else

           {

            Print("#2 Sell -> true. Result Retcode: ",m_trade.ResultRetcode(),

                  ", description of result: ",m_trade.ResultRetcodeDescription());

            PrintResultTrade(m_trade,m_symbol);

           }

        }

      else

        {

         Print("#3 Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),

               ", description of result: ",m_trade.ResultRetcodeDescription());

         PrintResultTrade(m_trade,m_symbol);

        }

     }

   else

     {

      Print(__FUNCTION__,", ERROR: method CAccountInfo::FreeMarginCheck returned the value ",DoubleToString(free_margin_check,2));

      return;

     }

//---

  }

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

//| Print CTrade result                                              |

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

void PrintResultTrade(CTrade &trade,CSymbolInfo &symbol)

  {

   Print("File: ",__FILE__,", symbol: ",m_symbol.Name());

   Print("Code of request result: "+IntegerToString(trade.ResultRetcode()));

   Print("code of request result as a string: "+trade.ResultRetcodeDescription());

   Print("Deal ticket: "+IntegerToString(trade.ResultDeal()));

   Print("Order ticket: "+IntegerToString(trade.ResultOrder()));

   Print("Volume of deal or order: "+DoubleToString(trade.ResultVolume(),2));

   Print("Price, confirmed by broker: "+DoubleToString(trade.ResultPrice(),symbol.Digits()));

   Print("Current bid price: "+DoubleToString(symbol.Bid(),symbol.Digits())+" (the requote): "+DoubleToString(trade.ResultBid(),symbol.Digits()));

   Print("Current ask price: "+DoubleToString(symbol.Ask(),symbol.Digits())+" (the requote): "+DoubleToString(trade.ResultAsk(),symbol.Digits()));

   Print("Broker comment: "+trade.ResultComment());

  }

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