I tried the mt5 TradeClass today ,Why I can't get the Ask price?

[Tiecheng Fu]

#include <Trade\SymbolInfo.mqh>
CSymbolInfo mysymbol;
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
   double Ask=mysymbol.Ask();
   Print("Ask is : ",Ask);
  }

print result is 0.0,   I don't know why? maybe I missed something?

thanks your reply,,,

[Anthony Garot]

Add this in your code:

mysymbol.RefreshRates();

[Alain Verleyen]

Anthony Garot:

Add this in your code:

Where should I add it, like this ? :-D

#include <Trade\SymbolInfo.mqh>
CSymbolInfo mysymbol;
//+------------------------------------------------------------------+
//| Script program start function                                    |

mysymbol.RefreshRates();
//+------------------------------------------------------------------+
void OnStart()
  {
   double Ask=mysymbol.Ask();
   Print("Ask is : ",Ask);
  }

[Anthony Garot]

Alain Verleyen:
Where should I add it, like this ? :-D

Ha! Point taken.

:-D

void OnStart()
  {
   mysymbol.RefreshRates();
   double Ask=mysymbol.Ask();
   Print("Ask is : ",Ask);
  }

[Tiecheng Fu]

Anthony Garot:

Ha! Point taken.

:-D

Tanks so much!   The first time to try mt5 TradeClass   : -(