Symbol of the current security
The return value is a string which can be used in the Scan or Trades section or as input to any String Function.
See also Symbol, which returns the current symbol as a Symbol Constant, and SymNum, which allows dynamic symbol lookup.
?Symbol = "MSFT" and Symbol = $MSFT would both accomplish the same purpose, but it is slightly more efficient to use symbol constants.
Symbol constants also have the advantage of smart auto-complete when entering them.