hotkeys

//+------------------------------------------------------------------+
//|                                                      hotKeys.mq4 |
//|                                     Copyright 2015,Mohit Marwaha |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2015, Mohit Marwaha"
#property link      "marwaha1@gmail.com"
#property version   "1.20"
#property strict
#property indicator_chart_window
#property description "Keys 1 through 9 change timeframes from 1 minute to Monthly"
#define KEY_MONTHLY 57
#define KEY_WEEKLY 56
#define KEY_DAILY 55
#define KEY_4HOUR 54
#define KEY_1HOUR 53
#define KEY_30MIN 52
#define KEY_15MIN 51
#define KEY_5MIN 50
#define KEY_1MIN 49
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   Comment("Copyright MohitMarwaha");
//---
   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[])
  {
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+
//| ChartEvent function                                              |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,
                  const long &lparam,
                  const double &dparam,
                  const string &sparam)
  {
//---
   if(id==CHARTEVENT_KEYDOWN)
     {
      switch(int(lparam))
        {
         case KEY_WEEKLY:ChartSetSymbolPeriod(0,NULL,10080);
         break;
         case KEY_DAILY:ChartSetSymbolPeriod(0,NULL,1440);
         break;
         case KEY_4HOUR:ChartSetSymbolPeriod(0,NULL,240);
         break;
         case KEY_1HOUR:ChartSetSymbolPeriod(0,NULL,60);
         break;
         case KEY_5MIN:ChartSetSymbolPeriod(0,NULL,5);
         break;
         case KEY_30MIN:ChartSetSymbolPeriod(0,NULL,30);
         break;
         case KEY_15MIN:ChartSetSymbolPeriod(0,NULL,15);
         break;
         case KEY_MONTHLY:ChartSetSymbolPeriod(0,NULL,43200);
         break;
         case KEY_1MIN:ChartSetSymbolPeriod(0,NULL,1);
         break;
        }
      ChartRedraw();
     }
  }
//+------------------------------------------------------------------+