tickGraphicInd

//+------------------------------------------------------------------+
//|                                               tickGraphicInd.mq5 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
//Autor: Infinity Trading
#property copyright "Copyright 2020, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots 2

#property indicator_label1 "Ask"
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrRed
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1

#property indicator_label2 "Bid"
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrBlue
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1


int       ticks_History=1999;


double    tAskBuffer[];
double    tBidBuffer[];
int       tAskHandle;
int       tBidHandle;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping

   ChartSetInteger(0,CHART_SHOW_GRID,false);
   ChartSetInteger(0,CHART_FOREGROUND,false);
   color clrBackGround=(color)ChartGetInteger(0,CHART_COLOR_BACKGROUND,0);
   ChartSetInteger(0,CHART_COLOR_CANDLE_BEAR,clrBackGround);
   ChartSetInteger(0,CHART_COLOR_CANDLE_BULL,clrBackGround);
   ChartSetInteger(0,CHART_COLOR_CHART_UP,clrBackGround);
   ChartSetInteger(0,CHART_COLOR_CHART_DOWN,clrBackGround);
   ChartSetInteger(0,CHART_COLOR_CHART_LINE,clrBackGround);
   ChartSetInteger(0,CHART_SCALE,0);
   ChartSetInteger(0,CHART_SCALEFIX,true);


   ArraySetAsSeries(tAskBuffer,true);
   ArraySetAsSeries(tBidBuffer,true);
   SetIndexBuffer(0,tAskBuffer,INDICATOR_DATA);
   SetIndexBuffer(1,tBidBuffer,INDICATOR_DATA);

//---
   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[])
  {
//---
   MqlTick mticks[];

   ArraySetAsSeries(mticks,true);

   if(!CopyTicks(_Symbol,mticks,COPY_TICKS_ALL,0,ticks_History))
     {
      Print("Error al copiar el array de ticks!!!");
     }
   else
     {
      int size=ArraySize(mticks);

      for(int i=0; i<size; i++)
        {
         tAskBuffer[i]=mticks[i].ask;
         tBidBuffer[i]=mticks[i].bid;
        }
     }

   int size2=ArraySize(mticks);
   int scale;
   int ticksH;
   int plus;
   ChartGetInteger(0,CHART_SCALE,0);

   switch(scale)
     {
      case 0:
         ticksH=1000;
         plus=5;
         break;
      case 1:
         ticksH=500;
         plus=4;
         break;
      case 2:
         ticksH=260;
         plus=3;
         break;
      case 3:
         ticksH=130;
         plus=2;
         break;
      case 4:
         ticksH=70;
         plus=1;
         break;
      case 5:
         ticksH=35;
         plus=1;
         break;
      default:
         ticksH=1000;
         plus=1;
         break;
     }

   int max=ArrayMaximum(tAskBuffer,1,ticksH);
   int min=ArrayMinimum(tBidBuffer,1,ticksH);


   ChartSetDouble(0,CHART_FIXED_MAX,tAskBuffer[max]+(0.00001*plus));
   ChartSetDouble(0,CHART_FIXED_MIN,tBidBuffer[min]-(0.00001*plus));


//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+