A convenience wrapper to getSymbols(x,src='oanda')
.The most useful aspect of getMetals is the ablity to specify the Metals
in terms of underlying 3 character symbol or by name (e.g. XAU (gold) , XAG (silver),
XPD (palladium), or XPT (platinum)).
There are unique aspects of any continuously traded commodity, and it
is recommended that the user visit http://www.oanda.com for
details on specific pricing issues.
See getSymbols
and getSymbls.oanda
for more detail.