Force Arrow Chart Alert

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

//|                                      Force Arrow Chart Alert.mq5 |

//|                              Copyright © 2021, Vladimir Karputov |

//|                      https://www.mql5.com/en/users/barabashkakvn |

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

#property copyright "Copyright © 2021, Vladimir Karputov"

#property link      "https://www.mql5.com/en/users/barabashkakvn"

#property version   "1.000"

#property indicator_chart_window

#property indicator_buffers 3

#property indicator_plots   2

//--- plot Force

#property indicator_label1  "Buy stop"

#property indicator_type1   DRAW_ARROW

#property indicator_color1  clrCornflowerBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot Force

#property indicator_label2  "Sell stop"

#property indicator_type2   DRAW_ARROW

#property indicator_color2  clrTomato

#property indicator_style2  STYLE_DASH

#property indicator_width2  1

//--- input parameters

input group             "Force Index"

input int                  Inp_Force_ma_period        = 2;           // Force: averaging period

input ENUM_MA_METHOD       Inp_Force_ma_method        = MODE_EMA;    // Force: smoothing type

input ENUM_APPLIED_VOLUME  Inp_Force_applied_volume   = VOLUME_TICK; // Force: volume type for calculation

input group             "Arrow Up"

input uchar                InpUpCode                  = 174;         // Arrow Up: code for style DRAW_ARROW (font Wingdings)

input int                  InpUpShift                 = 10;          // Arrow Up: vertical shift of arrows in pixels

input group             "Arrow Down"

input uchar                InpDownCode                = 174;         // Arrow Down: code for style DRAW_ARROW (font Wingdings)

input int                  InpDownShift               = 10;          // Arrow Down: vertical shift of arrows in pixels

input group             "Alerts"

input string               InpSoundName               = "alert.wav"; // Sound Name

input uchar                InpSoundRepetitions        = 3;           // Repetitions

input uchar                InpSoundPause              = 3;           // Pause, in seconds

input bool                 InpAlert                   = true;        // Alert

input bool                 InpMail                    = true;        // Send mail

input bool                 InpNotification            = true;        // Send notification

//--- indicator buffers

double   BuyStopBuffer[];

double   SellStopBuffer[];

double   iForceBuffer[];

//---

int      handle_iForce;                // variable for storing the handle of the iForce indicator

int      bars_calculated   = 0;        // we will keep the number of values in the Force indicator



datetime m_last_sound      = 0;        // "0" -> D'1970.01.01 00:00';

uchar    m_repetitions     = 0;        //

string   m_text            = "";       //

datetime m_prev_bars       = 0;        // "0" -> D'1970.01.01 00:00';



bool     m_init_error      = false;    // error on InInit

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,BuyStopBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,SellStopBuffer,INDICATOR_DATA);

   SetIndexBuffer(2,iForceBuffer,INDICATOR_CALCULATIONS);

//--- setting a code from the Wingdings charset as the property of PLOT_ARROW

   PlotIndexSetInteger(0,PLOT_ARROW,InpUpCode);

   PlotIndexSetInteger(1,PLOT_ARROW,InpDownCode);

//--- set the vertical shift of arrows in pixels

   PlotIndexSetInteger(0,PLOT_ARROW_SHIFT,-InpUpShift);

   PlotIndexSetInteger(1,PLOT_ARROW_SHIFT,InpDownShift);

//--- set as an empty value 0.0

   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE);

   PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,EMPTY_VALUE);

//--- sets first bar from what index will be drawn

   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,Inp_Force_ma_period);

//--- name for DataWindow and indicator subwindow label

   string short_name=StringFormat("Force Arrow Chart(%d)",Inp_Force_ma_period);

   IndicatorSetString(INDICATOR_SHORTNAME,short_name);

//--- create handle of the indicator

   handle_iForce=iForce(Symbol(),Period(),Inp_Force_ma_period,Inp_Force_ma_method,Inp_Force_applied_volume);

//--- if the handle is not created

   if(handle_iForce==INVALID_HANDLE)

     {

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

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

                  Symbol(),

                  EnumToString(Period()),

                  GetLastError());

      //--- the indicator is stopped early

      m_init_error=true;

      return(INIT_SUCCEEDED);

     }

//---

   return(INIT_SUCCEEDED);

  }

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

//| Custom indicator iteration function                              |

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

int OnCalculate(const int rates_total,

                const int prev_calculated,

                const datetime &time[],

                const double &open[],

                const double &high[],

                const double &low[],

                const double &close[],

                const long &tick_volume[],

                const long &volume[],

                const int &spread[])

  {

//--- number of values copied from the iForce indicator

   int values_to_copy;

//--- determine the number of values calculated in the indicator

   int calculated=BarsCalculated(handle_iForce);

   if(calculated<=0)

     {

      PrintFormat("BarsCalculated() returned %d, error code %d",calculated,GetLastError());

      return(0);

     }

//--- if it is the first start of calculation of the indicator or if the number of values in the iForce indicator changed

//---or if it is necessary to calculated the indicator for two or more bars (it means something has changed in the price history)

   if(prev_calculated==0 || calculated!=bars_calculated || rates_total>prev_calculated+1)

     {

      //--- if the iForceBuffer array is greater than the number of values in the iForce indicator for symbol/period, then we don't copy everything

      //--- otherwise, we copy less than the size of indicator buffers

      if(calculated>rates_total)

         values_to_copy=rates_total;

      else

         values_to_copy=calculated;

     }

   else

     {

      //--- it means that it's not the first time of the indicator calculation, and since the last call of OnCalculate()

      //--- for calculation not more than one bar is added

      values_to_copy=(rates_total-prev_calculated)+1;

     }

//--- fill the iForceBuffer array with values of the Force indicator

//--- if FillArrayFromBuffer returns false, it means the information is nor ready yet, quit operation

   if(!FillArrayFromBuffer(iForceBuffer,handle_iForce,values_to_copy))

      return(0);

//--- memorize the number of values

   bars_calculated=calculated;

//--- main loop

   int limit=prev_calculated-1;

   if(prev_calculated==0)

     {

      BuyStopBuffer[0]=EMPTY_VALUE;

      SellStopBuffer[0]=EMPTY_VALUE;

      limit=1;

     }

   for(int i=limit; i<rates_total; i++)

     {

      BuyStopBuffer[i]=EMPTY_VALUE;

      SellStopBuffer[i]=EMPTY_VALUE;

      if(iForceBuffer[i-1]>0.0 && iForceBuffer[i]<0.0)

         BuyStopBuffer[i]=high[i];

      if(iForceBuffer[i-1]<0.0 && iForceBuffer[i]>0.0)

         SellStopBuffer[i]=low[i];

     }

//--- alert

   if(time[rates_total-1]>m_prev_bars)

     {

      m_last_sound=0;

      m_prev_bars=time[rates_total-1];

      m_repetitions=0;

     }

   if(m_repetitions>=InpSoundRepetitions)

      return(rates_total);

   datetime time_current=TimeCurrent();

   if(time_current-m_last_sound>InpSoundPause)

     {

      int i=rates_total-1;

      if(BuyStopBuffer[i]!=EMPTY_VALUE)

        {

         PlaySound(InpSoundName);

         m_text=Symbol()+","+StringSubstr(EnumToString(Period()),7,-1)+" Buy stop, "+TimeToString(time[i]);

         if(InpAlert)

            Alert(m_text);

         m_last_sound=time_current;

         m_repetitions++;

         //---

         if(InpMail)

           {

            SendMail(Symbol()+","+StringSubstr(EnumToString(Period()),7,-1),m_text);

           }

         if(InpNotification)

           {

            SendNotification(Symbol()+","+StringSubstr(EnumToString(Period()),7,-1)+" "+m_text);

           }

        }

      else

        {

         if(SellStopBuffer[i]!=EMPTY_VALUE)

           {

            PlaySound(InpSoundName);

            m_text=Symbol()+","+StringSubstr(EnumToString(Period()),7,-1)+" Sell stop, "+TimeToString(time[i]);

            if(InpAlert)

               Alert(m_text);

            m_last_sound=time_current;

            m_repetitions++;

            //---

            if(InpMail)

              {

               SendMail(Symbol()+","+StringSubstr(EnumToString(Period()),7,-1),m_text);

              }

            if(InpNotification)

              {

               SendNotification(Symbol()+","+StringSubstr(EnumToString(Period()),7,-1)+" "+m_text);

              }

           }

        }

     }

//--- return value of prev_calculated for next call

   return(rates_total);

  }

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

//| Filling indicator buffers from the iForce indicator              |

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

bool FillArrayFromBuffer(double &values[],  // indicator buffer of Force Index values

                         int ind_handle,    // handle of the iForce indicator

                         int amount         // number of copied values

                        )

  {

//--- reset error code

   ResetLastError();

//--- fill a part of the iForceBuffer array with values from the indicator buffer that has 0 index

   if(CopyBuffer(ind_handle,0,0,amount,values)<0)

     {

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

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

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

      return(false);

     }

//--- everything is fine

   return(true);

  }

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

//| Indicator deinitialization function                              |

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

void OnDeinit(const int reason)

  {

   if(handle_iForce!=INVALID_HANDLE)

      IndicatorRelease(handle_iForce);

  }

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