New Random

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

//|                                                   New Random.mq5 |

//|                              Copyright © 2017, Vladimir Karputov |

//|                                           http://wmua.ru/slesar/ |

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

#property copyright "Copyright © 2017, Vladimir Karputov"

#property link      "http://wmua.ru/slesar/"

#property version   "1.002"

#property description "Three modes of selecting the type of the opened position:" 

#property description "based on the random number generator; BUY-SELL-BUY sequence; SELL-BUY-SELL sequence"

//---

#include <Trade\PositionInfo.mqh>

#include <Trade\Trade.mqh>

#include <Trade\SymbolInfo.mqh>  

CPositionInfo  m_position;                   // trade position object

CTrade         m_trade;                      // trading object

CSymbolInfo    m_symbol;                     // symbol info object

//---

enum ENUM_RANDOM_TYPE

  {

   RANDOM_TYPE_GENERATOR         =0,         // Random number generator

   RANDOM_TYPE_BUY_SELL_BUY      =1,         // The sequence BUY - SELL - BUY ... 

   RANDOM_TYPE_SELL_BUY_SELL     =2,         // The sequence SELL - BUY - SELL ...  

  };

//--- input parameters

input ENUM_RANDOM_TYPE  InpRandom= 0;        // Random type

input ushort   InpCountMinLots   = 1;        // Count minimal lots

input ushort   InpStopLoss       = 50;       // Stop Loss (in pips)

input ushort   InpTakeProfit     = 50;       // Take Profit (in pips)

//---

ulong          m_ticket;

ulong          m_magic=8263500;              // magic number

ulong          m_slippage=30;                // slippage



double         ExtStopLoss=0;

double         ExtTakeProfit=0;

double         ExtTrailingStop=0;

double         ExtTrailingStep=0;

//--- prefix to store the type of the generator

string prefix_random_type="New Random Random Type";

//--- prefix to store the type of the last opened position (BUY - "0", SELL "1")

string prefix_last_open_type="New Random Last Open Type";



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

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

//| Expert initialization function                                   |

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

int OnInit()

  {

//---

   string text="";

   if(InpRandom==RANDOM_TYPE_GENERATOR)

     {

      //--- initialize the generator of random numbers 

      MathSrand(GetTickCount());



      GlobalVariableDel(prefix_last_open_type);       // unconditional removal global variable "prefix_last_open_type"

      if(!GlobalVariableCheck(prefix_random_type))

         GlobalVariableSet(prefix_random_type,InpRandom);

      else

         GlobalVariableSetOnCondition(prefix_random_type,RANDOM_TYPE_GENERATOR,RANDOM_TYPE_BUY_SELL_BUY || RANDOM_TYPE_SELL_BUY_SELL);

     }

   else

     {

      if(!GlobalVariableCheck(prefix_random_type))

        {

         GlobalVariableSet(prefix_random_type,InpRandom);

         if(!GlobalVariableCheck(prefix_last_open_type))

           {

            if(InpRandom==RANDOM_TYPE_BUY_SELL_BUY)

               GlobalVariableSet(prefix_last_open_type,1);

            else if(InpRandom==RANDOM_TYPE_SELL_BUY_SELL)

               GlobalVariableSet(prefix_last_open_type,0);

           }

        }

      else

        {

         if(GlobalVariableGet(prefix_random_type)!=InpRandom)

           {

            GlobalVariableSet(prefix_random_type,InpRandom);

            if(InpRandom==RANDOM_TYPE_BUY_SELL_BUY)

               GlobalVariableSet(prefix_last_open_type,1);

            else if(InpRandom==RANDOM_TYPE_SELL_BUY_SELL)

               GlobalVariableSet(prefix_last_open_type,0);

           }

         else

           {

            if(!GlobalVariableCheck(prefix_last_open_type))

              {

               if(InpRandom==RANDOM_TYPE_BUY_SELL_BUY)

                  GlobalVariableSet(prefix_last_open_type,1);

               else if(InpRandom==RANDOM_TYPE_SELL_BUY_SELL)

                  GlobalVariableSet(prefix_last_open_type,0);

              }

           }

        }

     }

//---

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

      return(INIT_FAILED);

   RefreshRates();



   string err_text="";

   if(!CheckVolumeValue(InpCountMinLots*m_symbol.LotsMin(),err_text))

     {

      Print(err_text);

      return(INIT_PARAMETERS_INCORRECT);

     }

//---

   m_trade.SetExpertMagicNumber(m_magic);

//---

   if(IsFillingTypeAllowed(SYMBOL_FILLING_FOK))

      m_trade.SetTypeFilling(ORDER_FILLING_FOK);

   else if(IsFillingTypeAllowed(SYMBOL_FILLING_IOC))

      m_trade.SetTypeFilling(ORDER_FILLING_IOC);

   else

      m_trade.SetTypeFilling(ORDER_FILLING_RETURN);

//---

   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;

//---

   return(INIT_SUCCEEDED);

  }

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

//| Expert deinitialization function                                 |

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

void OnDeinit(const int reason)

  {

//---



  }

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

//| Expert tick function                                             |

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

void OnTick()

  {

//---

   int total=0;

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

            total++;



   if(total>0)

      return;



   if(!RefreshRates())

      return;



   switch(InpRandom)

     {

      case  RANDOM_TYPE_GENERATOR:

         //--- BUY - "1", SELL "2"

         if(MathRand()%2==0)

           {

            double sl=(InpStopLoss==0)?0.0:m_symbol.Bid()+ExtStopLoss;

            double tp=(InpTakeProfit==0)?0.0:m_symbol.Bid()-ExtTakeProfit;

            m_trade.Sell((double)InpCountMinLots*m_symbol.LotsMin(),m_symbol.Name(),

                         m_symbol.Bid(),

                         m_symbol.NormalizePrice(sl),

                         m_symbol.NormalizePrice(tp));

           }

         else

           {

            double sl=(InpStopLoss==0)?0.0:m_symbol.Ask()-ExtStopLoss;

            double tp=(InpTakeProfit==0)?0.0:m_symbol.Ask()+ExtTakeProfit;

            m_trade.Buy((double)InpCountMinLots*m_symbol.LotsMin(),m_symbol.Name(),

                        m_symbol.Ask(),

                        m_symbol.NormalizePrice(sl),

                        m_symbol.NormalizePrice(tp));

           }

         break;

      default:

         //--- BUY - "0", SELL "1"

         if(GlobalVariableGet(prefix_last_open_type)==0)

           {

            double sl=(InpStopLoss==0)?0.0:m_symbol.Ask()-ExtStopLoss;

            double tp=(InpTakeProfit==0)?0.0:m_symbol.Ask()+ExtTakeProfit;

            m_trade.Buy((double)InpCountMinLots*m_symbol.LotsMin(),m_symbol.Name(),

                        m_symbol.Ask(),

                        m_symbol.NormalizePrice(sl),

                        m_symbol.NormalizePrice(tp));

           }

         if(GlobalVariableGet(prefix_last_open_type)==1)

           {

            double sl=(InpStopLoss==0)?0.0:m_symbol.Ask()-ExtStopLoss;

            double tp=(InpTakeProfit==0)?0.0:m_symbol.Ask()+ExtTakeProfit;

            m_trade.Buy((double)InpCountMinLots*m_symbol.LotsMin(),m_symbol.Name(),

                        m_symbol.Ask(),

                        m_symbol.NormalizePrice(sl),

                        m_symbol.NormalizePrice(tp));

           }

     }

  }

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

//| Refreshes the symbol quotes data                                 |

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

bool RefreshRates()

  {

//--- refresh rates

   if(!m_symbol.RefreshRates())

      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 order volume                        |

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

bool CheckVolumeValue(double volume,string &error_description)

  {

//--- minimal allowed volume for trade operations

// double min_volume=m_symbol.LotsMin();

   double min_volume=SymbolInfoDouble(Symbol(),SYMBOL_VOLUME_MIN);

   if(volume<min_volume)

     {

      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();

   double max_volume=SymbolInfoDouble(Symbol(),SYMBOL_VOLUME_MAX);

   if(volume>max_volume)

     {

      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();

   double volume_step=SymbolInfoDouble(Symbol(),SYMBOL_VOLUME_STEP);



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

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

     {

      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);

  }

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

//| Checks if the specified filling mode is allowed                  | 

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

bool IsFillingTypeAllowed(int fill_type)

  {

//--- Obtain the value of the property that describes allowed filling modes 

   int filling=m_symbol.TradeFillFlags();

//--- Return true, if mode fill_type is allowed 

   return((filling & fill_type)==fill_type);

  }

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