CCI Color

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

//|                                                    CCI Color.mq5 |

//|                              Copyright © 2022, Vladimir Karputov |

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

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

#property copyright "Copyright © 2022, Vladimir Karputov"

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

#property version   "1.001"

#property indicator_separate_window

#property indicator_buffers 2

#property indicator_plots   1

//--- CCI

#property indicator_label1  "CCI"

#property indicator_type1   DRAW_COLOR_LINE

#property indicator_color1  clrRed,clrBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- input parameters

input int      Inp_CCI_ma_period = 14;    // Averaging period

input double   Inp_CCI_LevelUP   = 100;   // Level UP

input double   Inp_CCI_LevelDOWN =-100;   // Level DOWN

//--- indicator buffers

double   CCI_Buffer[];

double   CCC_Colors[];

//---

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()

  {

//--- check for input value of period

   if(Inp_CCI_ma_period<=0)

     {

      printf("Incorrect value for input variable \"Averaging period\"=%d.",Inp_CCI_ma_period);

      return(INIT_PARAMETERS_INCORRECT);

     }

//--- indicator buffers mapping

   SetIndexBuffer(0,CCI_Buffer,INDICATOR_DATA);

   SetIndexBuffer(1,CCC_Colors,INDICATOR_COLOR_INDEX);

//--- set levels

   IndicatorSetInteger(INDICATOR_LEVELS,2);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,0,Inp_CCI_LevelUP);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,1,Inp_CCI_LevelDOWN);

//--- indicator name

   IndicatorSetString(INDICATOR_SHORTNAME,"CCI Color("+IntegerToString(Inp_CCI_ma_period)+")");

//--- indexes draw begin settings

   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,Inp_CCI_ma_period-1);

//--- number of digits of indicator value

   IndicatorSetInteger(INDICATOR_DIGITS,2);

//--- create handle of the indicator iCCI

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

//--- 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(CCI_Buffer,handle_iCCI,values_to_copy))

      return(0);

   if(rates_total<3)

      return(0);

   int limit=prev_calculated-1;

   if(prev_calculated==0)

      limit=1;

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

     {

      //--- zero crossing

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

         CCC_Colors[i]=1.0;

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

         CCC_Colors[i]=0.0;

      //---

      if(CCI_Buffer[i]>=0.0)

         CCC_Colors[i]=1.0;

      else

         CCC_Colors[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);

  }

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