CCI Color Candles

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

//|                                            CCI Color Candles.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 6

#property indicator_plots   1

//--- plot Candles

#property indicator_label1  "Candles"

#property indicator_type1   DRAW_COLOR_CANDLES

#property indicator_color1  clrRed,clrBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- input parameters

input group             "iCCI"

input int                  Inp_CCI_ma_period    = 14;             // CCI: averaging period

input ENUM_APPLIED_PRICE   Inp_CCI_applied_price= PRICE_TYPICAL;  // CCI: type of price

//--- indicator buffers

double   OpenBuffer[];

double   HighBuffer[];

double   LowBuffer[];

double   CloseBuffer[];

double   CandlesColors[];

double   BufferCCI[];

//---

int      handle_iCCI;                  // variable for storing the handle of the iCCI indicator

int      bars_calculated   = 0;        // we will keep the number of values in the Commodity Channel Index indicator

bool     m_init_error      = false;    // error on InInit

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,OpenBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,HighBuffer,INDICATOR_DATA);

   SetIndexBuffer(2,LowBuffer,INDICATOR_DATA);

   SetIndexBuffer(3,CloseBuffer,INDICATOR_DATA);

   SetIndexBuffer(4,CandlesColors,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(5,BufferCCI,INDICATOR_CALCULATIONS);

//--- an empty value

   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);

//--- set the display of the symbol

   PlotIndexSetString(0,PLOT_LABEL," Open;"+" High;"+" Low;"+" Close");

//--- indexes draw begin settings

   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,Inp_CCI_ma_period-1);

//--- create handle of the indicator iCCI

   handle_iCCI=iCCI(Symbol(),Period(),Inp_CCI_ma_period,Inp_CCI_applied_price);

//--- if the handle is not created

   if(handle_iCCI==INVALID_HANDLE)

     {

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

      PrintFormat("Failed to create handle of the iCCI 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[])

  {

   if(m_init_error)

      return(0);

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

   int values_to_copy;

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

   int calculated=BarsCalculated(handle_iCCI);

   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 iCCI 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 CCI array is greater than the number of values in the iCCI 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 CCI array with values of the Commodity Channel Index indicator

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

   if(!FillArrayFromBuffer(BufferCCI,handle_iCCI,values_to_copy))

      return(0);

//--- main loop

   int limit=prev_calculated-1;

   if(prev_calculated==0)

      limit=1;

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

     {

      OpenBuffer[i]=open[i];

      HighBuffer[i]=high[i];

      LowBuffer[i]=low[i];

      CloseBuffer[i]=close[i];

      CandlesColors[i]=0.0;

      //--- zero crossing

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

         CandlesColors[i]=1.0;

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

         CandlesColors[i]=0.0;

      //---

      if(BufferCCI[i]>=0.0)

         CandlesColors[i]=1.0;

      else

         CandlesColors[i]=0.0;

     }

//--- memorize the number of values in the Commodity Channel Index indicator

   bars_calculated=calculated;

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

   return(rates_total);

  }

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

//| Filling indicator buffers from the iCCI indicator                |

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

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

                         int ind_handle,    // handle of the iCCI indicator

                         int amount         // number of copied values

                        )

  {

//--- reset error code

   ResetLastError();

//--- fill a part of the CCI 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 iCCI 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_iCCI!=INVALID_HANDLE)

      IndicatorRelease(handle_iCCI);

  }

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