MinMax_MA

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

//|                                                    MinMax_MA.mq5 |

//|                        Copyright 2018, MetaQuotes Software Corp. |

//|                                                 https://mql5.com |

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

#property copyright "Copyright 2018, MetaQuotes Software Corp."

#property link      "https://mql5.com"

#property version   "1.00"

#property indicator_chart_window

#property indicator_buffers 2

#property indicator_plots   1

//--- plot MA

#property indicator_label1  "MA"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrCrimson

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- input parameters

input uint                 InpPeriod         =  10;            // Period

input ENUM_APPLIED_PRICE   InpAppliedPrice   =  PRICE_CLOSE;   // Applied price

//--- indicator buffers

double         BufferMA[];

double         BufferPrice[];

//--- global variables

int            period;

int            handle_ma;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- setting global variables

   period=int(InpPeriod<1 ? 1 : InpPeriod);

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferMA,INDICATOR_DATA);

   SetIndexBuffer(1,BufferPrice,INDICATOR_CALCULATIONS);

//--- settings indicators parameters

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

   IndicatorSetString(INDICATOR_SHORTNAME,"Minimum-maximum Moving Average");

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferMA,true);

   ArraySetAsSeries(BufferPrice,true);

//--- create MA and ATR handles

   ResetLastError();

   handle_ma=iMA(Symbol(),PERIOD_CURRENT,1,0,MODE_SMA,InpAppliedPrice);

   if(handle_ma==INVALID_HANDLE)

     {

      Print("The iMA(1) object was not created: Error ",GetLastError());

      return INIT_FAILED;

     }

//---

   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[])

  {

//--- @>25@:0 =0 <8=8<0;L=>5 :>;8G5AB2> 10@>2 4;O @0AGQB0

   if(rates_total<period) return 0;

//--- @>25@:0 8 @0AGQB :>;8G5AB20 ?@>AG8BK205<KE 10@>2

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-1;

      ArrayInitialize(BufferMA,EMPTY_VALUE);

      ArrayInitialize(BufferPrice,EMPTY_VALUE);

     }

//--- >43>B>2:0 40==KE

   int copied=0,count=(limit==0 ? 1 : rates_total);

   copied=CopyBuffer(handle_ma,0,0,count,BufferPrice);

   if(copied!=count) return 0;

//---  0AGQB 8=48:0B>@0

   for(int i=limit; i>=0 && !IsStopped(); i--)

     {

      int min_b=ArrayMinimum(BufferPrice,i,period);

      int max_b=ArrayMaximum(BufferPrice,i,period);

      if(min_b==WRONG_VALUE || max_b==WRONG_VALUE) continue;

      double min=BufferPrice[min_b];

      double max=BufferPrice[max_b];

      BufferMA[i]=(min+max)/2.0;

     }

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

   return(rates_total);

  }

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