Momentum smoothing Dot

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

//|                                       Momentum smoothing Dot.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"

#include <MovingAverages.mqh>

#property indicator_separate_window

#property indicator_buffers 3

#property indicator_plots   2

//--- plot Momentum

#property indicator_label2  "Momentum"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrDodgerBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- plot Momentum Dot

#property indicator_label2  "Momentum Dot"

#property indicator_type2   DRAW_ARROW

#property indicator_color2  clrLime

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//---- input parameters

input int                  Inp_Momentum_mom_period    = 14;          // averaging period

input ENUM_MA_METHOD       Inp_Momentum_ma_method     = MODE_SMA;    // type of smoothing

input ENUM_APPLIED_PRICE   Inp_Momentum_applied_price = PRICE_CLOSE; // type of price

//--- indicator buffers

double   MomentumBuffer[];

double   MomentumDotBuffer[];

double   MomentumBufferTemp[];

//---

int      handle_iMomentum;             // variable for storing the handle of the iMomentum indicator

string   short_name;                   // name of the indicator on a chart

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

int      m_weightsum;

bool     m_init_error         = false; // error on InInit

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

   m_weightsum=0;

//--- indicator buffers mapping

   SetIndexBuffer(0,MomentumBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,MomentumDotBuffer,INDICATOR_DATA);

   SetIndexBuffer(2,MomentumBufferTemp,INDICATOR_CALCULATIONS);

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

   PlotIndexSetInteger(1,PLOT_ARROW,159);

//--- Set as an empty value 0.0

   PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0.0);

//--- create handle of the indicator iMomentum

   handle_iMomentum=iMomentum(Symbol(),Period(),Inp_Momentum_mom_period,

                              Inp_Momentum_applied_price);

//--- if the handle is not created

   if(handle_iMomentum==INVALID_HANDLE)

     {

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

      PrintFormat("Failed to create handle of the iMomentum 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);

     }

//---

   short_name=StringFormat("Momentum smoothing Dot(%d)",Inp_Momentum_mom_period);

   IndicatorSetString(INDICATOR_SHORTNAME,short_name);

//--- digits

   IndicatorSetInteger(INDICATOR_DIGITS,2);

//--- normal initialization of the indicator

   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[])

  {

   if(m_init_error || rates_total<Inp_Momentum_mom_period+1)

      return(0);

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

   int values_to_copy;

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

   int calculated=BarsCalculated(handle_iMomentum);

   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 iMomentum 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 iMomentumBuffer array is greater than the number of values in the iMomentum 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 iMomentumBuffer array with values of the Momentum indicator

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

   if(!FillArrayFromBuffer(MomentumBufferTemp,handle_iMomentum,values_to_copy))

      return(0);

   /*  if(prev_calculated==0)

         for(int i=0;i<Inp_Momentum_mom_period-1;i++)

            MomentumBuffer[i]=0.0;*/

   switch(Inp_Momentum_ma_method)

     {

      case  MODE_SMA:

         SimpleMAOnBuffer(rates_total,prev_calculated,Inp_Momentum_mom_period+1,3,MomentumBufferTemp,MomentumBuffer);

         break;

      case  MODE_EMA:

         ExponentialMAOnBuffer(rates_total,prev_calculated,Inp_Momentum_mom_period+1,3,MomentumBufferTemp,MomentumBuffer);

         break;

      case  MODE_SMMA:

         SmoothedMAOnBuffer(rates_total,prev_calculated,Inp_Momentum_mom_period+1,3,MomentumBufferTemp,MomentumBuffer);

         break;

      default:

         LinearWeightedMAOnBuffer(rates_total,prev_calculated,Inp_Momentum_mom_period+1,9,MomentumBufferTemp,MomentumBuffer,m_weightsum);

         break;

     }

//--- memorize the number of values in the Momentum indicator

   bars_calculated=calculated;

//--- main loop

   int limit=prev_calculated-1;

   if(prev_calculated==0)

     {

      limit=2;

      MomentumDotBuffer[0]=0.0;

      MomentumDotBuffer[1]=0.0;

     }

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

     {

      MomentumDotBuffer[i]=0.0;

      if((MomentumBuffer[i-2]<MomentumBuffer[i-1] && MomentumBuffer[i-1]>MomentumBuffer[i]) ||

         (MomentumBuffer[i-2]>MomentumBuffer[i-1] && MomentumBuffer[i-1]<MomentumBuffer[i]))

         MomentumDotBuffer[i-1]=MomentumBuffer[i-1];

     }

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

   return(rates_total);

  }

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

//| Filling indicator buffers from the iMomentum indicator           |

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

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

                         int ind_handle,    // handle of the iMomentum indicator

                         int amount         // number of copied values

                        )

  {

//--- reset error code

   ResetLastError();

//--- fill a part of the iMomentumBuffer 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 iMomentum 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_iMomentum!=INVALID_HANDLE)

      IndicatorRelease(handle_iMomentum);

  }

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