Value of Symbols on different charts

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I'm not sure why I'm having such a hard time with but here it is.

I'm trying to get the value of the GBPEUR no matter what chart I drop my indicator on. Then I want to store that value in a variable. I have been trying to test this with the print function so I could see if I was successful however nothing is printing to the journal. What on earth am I missing.

Also I'm totally new to programming. This is my very first project attempt.

Thanks in advance for any guidance.

 Here is my attempt:

//+------------------------------------------------------------------+
//|                               My_Currency_Strength_Indicator.mq4 |
//|                                               Erick_Fenstermaker |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Erick_Fenstermaker"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
//+------------------------------------------------------------------+
//| 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[])
                

  {
//This is where I'm trying to get the value of GBPEUR and store it in a variable named GBPEUR then print it to the journal.
//Nothing prints so I'm not sure If I'm successful or not. I'm not getting any errors. Only a warning about conversion at this point.
double GBPEUR = MarketInfo("GBPEUR",MODE_ASK);
Print("The ASk price of the GBPEUR is: " + GBPEUR);


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

//+------------------------------------------------------------------+
 
OK I still dont know why it wont print however I changed the print function to a comment function and I'm able to see that I was indeed not successful. I realized I wrote the symbol improperly. 
 
SirFency:
OK I still dont know why it wont print however I changed the print function to a comment function and I'm able to see that I was indeed not successful. I realized I wrote the symbol improperly. 
GBPEUR doesn't exist. You have to use EURGBP.
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