Nested Struct / Global Variable Class(or library)

How about Enumerations ? 

enum gv_type
{
gvt_buy=0,//Buy
gvt_sell=1,//Sell
gvt_buy_stop=2,//Buy Stop
gvt_sell_stop=3,//Sell Stop
gvt_buy_limit=4,//Buy Limit 
gvt_sell_limit=5,//Sell Limit
gvt_deposit=6,//Deposit
gvt_withdrawal=7//Withdrawal
};

struct GV_PAIR
{
string Symbol;
gv_type Type;
double Lot;
datetime OpenTime;
double StopLoss;
double TakeProfit;
};

Agree that enumerations are a way to deal with Global Variables (GV).

I probably have to "enum Symbol" instead of "string symbol" as well if i want to store symbol in the value of GV.

Need to test if i need to "double to int" before comparing value stored in GV to the enum.

I suppose i need to work around it as such.  Code dont feel right..... but a work around nonetheless...

struct STRUCT_GV_PAIR_NAME
  {
      string   Name;                // Pair Name
      string   Pair;                // Pair Number
      string   iMargin;             // Initial Margin
      string   mMargin;             // Maintenance Margin
      string   Direction;           // Direction
  };

struct STRUCT_GV_PAIR_VALUE
  {
      double   Name;                // Pair Name
      double   Pair;                // Pair Number
      double   iMargin;             // Initial Margin
      double   mMargin;             // Maintenance Margin
      double   Direction;           // Direction
  };

The code you posted compiles just fine.

struct STRUCT_GV
   {
      string   Name;                   // GV Name
      double   Value;                  // GV Value
      double   Time;                   // GV Time Last Accessed
   
   };
struct STRUCT_GV_PAIR
  {
      STRUCT_GV   Name;                // Pair Name
      STRUCT_GV   Pair;                // Pair Number
      STRUCT_GV   iMargin;             // Initial Margin
      STRUCT_GV   mMargin;             // Maintenance Margin
      STRUCT_GV   Direction;           // Direction
  };

Try that in Visual Studio as a Struct. Your going to get errors and warnings.

Guys,

My bad. Alain is right.

It compiles all right.

If I used the following in OnInit, it compiles okay.  I used it in the variable definition portion, causing the error.  My bad. Sorrie.

EURUSD[0].Direction.Value=1.0;