//+------------------------------------------------------------------+
//|                                       Force_Timeframe_Symbol.mq4 |
//|                                          Copyright 2022 mql5.com |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2022 mql5.com"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window

input ENUM_TIMEFRAMES   Timeframe  = PERIOD_H4; // Timeframe (current = you can change TFs)
input string            inpSymbol  = "EURUSD"; // Symbol (with prefix and suffix)
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   
//---
   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(Timeframe==PERIOD_CURRENT && _Symbol!=inpSymbol)
                 {
                 ChartSetSymbolPeriod(0,inpSymbol,PERIOD_CURRENT);
                 return rates_total;
                 }
                else
                if(Timeframe!=PERIOD_CURRENT && (_Period!=Timeframe || _Symbol!=inpSymbol))
                 ChartSetSymbolPeriod(0,inpSymbol,Timeframe);
   
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+