Average trend

ÿþ//------------------------------------------------------------------

#property copyright   "© mladen, 2019"

#property link        "mladenfx@gmail.com"

#property description "average trend"

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#property indicator_separate_window

#property indicator_buffers 5

#property indicator_plots   1

#property indicator_label1  "Average trend"

#property indicator_type1   DRAW_COLOR_LINE

#property indicator_style1  STYLE_SOLID

#property indicator_color1  clrDarkGray,clrDodgerBlue,clrSandyBrown

#property indicator_width1  2



//

//

//



input int                inpMaPeriod     = 35;          // Average period

input ENUM_MA_METHOD     inpMaMethod     = MODE_EMA;    // Average method

input ENUM_APPLIED_PRICE inpPrice        = PRICE_CLOSE; // Price

input double             inpAcceleration = 1.05;        // Acceleration factor



//

//

//



double val[],valc[],avg[],trend[],step[];

int _maHandle;



//------------------------------------------------------------------ 

//

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//

//

//



int OnInit()

{

   SetIndexBuffer(0,val  ,INDICATOR_DATA);

   SetIndexBuffer(1,valc ,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,avg  ,INDICATOR_CALCULATIONS);

   SetIndexBuffer(3,trend,INDICATOR_CALCULATIONS);

   SetIndexBuffer(4,step ,INDICATOR_CALCULATIONS);

   

   //

   //

   //

   

      _maHandle  = iMA(_Symbol,0,inpMaPeriod,0,inpMaMethod,inpPrice); if (!_checkHandle(_maHandle,"average")) return(INIT_FAILED);

   IndicatorSetString(INDICATOR_SHORTNAME,"Average ("+StringSubstr(EnumToString(inpMaMethod),5)+") trend ("+(string)inpMaPeriod+","+(string)inpAcceleration+")");

   return (INIT_SUCCEEDED);

  }

void OnDeinit(const int reason) { }



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//

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//

//

//



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[])

{

  

   int _copyCount = rates_total-prev_calculated+1; if (_copyCount>rates_total) _copyCount=rates_total;

         if (CopyBuffer(_maHandle,0,0,_copyCount,avg)!=_copyCount) return(prev_calculated);



   //

   //

   //

     

   int i=prev_calculated-1; if (i<0) i=0; for (; i<rates_total && !_StopFlag; i++)

   {

      if (i>0)

      {

         trend[i] = (avg[i]>avg[i-1]) ? 1 : (avg[i]<avg[i-1]) ? -1 : trend[i-1];

         step[i]  = (trend[i]!=trend[i-1]) ? 0.01 : step[i-1]*inpAcceleration;

         val[i]   = (val[i-1]+trend[i]*step[i]);

      }

      else { trend[i] = 0; step[i] = 0.01; val[i] = 0; }         

      valc[i] = (trend[i]==1) ? 1 : (trend[i]==-1) ? 2 : 0;

   }

   return(i);

}



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// Custom functions

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//

//---

//



bool _checkHandle(int _handle, string _description)

{

   static int  _chandles[];

          int  _size   = ArraySize(_chandles);

          bool _answer = (_handle!=INVALID_HANDLE);

          if  (_answer)

               { ArrayResize(_chandles,_size+1); _chandles[_size]=_handle; }

          else { for (int i=_size-1; i>=0; i--) IndicatorRelease(_chandles[i]); ArrayResize(_chandles,0); Alert(_description+" initialization failed"); }

   return(_answer);

}  

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