"X" - just goes in front of it from ye-olde-fx-trader convention,
this has been replaced by ISO codes for currencies but not precious metals I
guess.
A0 - Implies the spot price rather than a forward price
FX - Represents 'The Exchange"
Why would a special data subscription be required for these? I get a "Not Ent. " error when I try to get quotes on them. (I have the eSignal equities package (with e-minis) and delayed North American futures.)
The REALTIME silver and gold spot prices are available FREE on web pages such as these:
We're providing our spot metals pricing via the GTIS Forex service. You can subscribe in either RT or Delayed. Here's our pricing page for more information.
There are services that create their own spot prices and re-distribute for free. Not sure how those spot prices compare but GTIS is a well-respected source and has been delivering fixed income and currency data for over 20 years.
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