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The Symbol syntax element returns the alphabetical ordinal number of the current symbol in the currently loaded DataFile.
The main use of this number is to compare it to a specific symbol.
For this purpose, every symbol in the current data set can be referenced as a constant beginning with a dollar sign, e.g. $MSFT.
Symbol constants simply return the ordinal number of the specified symbol if it exists in the current data, or 0 if not.
The most common use of symbol constants is when constraining a strategy to only trade a specific symbol, as in this example:
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Note that if a symbol already begins with a dollar sign, e.g. $SPX, then it must be stated with a double dollar sign, i.e. $$SPX, when used as a symbol constant. The first $ tells RealTest that you're looking for a symbol, and the second $ is literally part of the symbol.
See also:
•?Symbol - returns the current symbol as a string (without the leading $)
•SymNum - looks up a symbol string (without the leading $) and returns the Symbol number
If the current symbol is MSFT, then any of the following will return its symbol number:
•$MSFT
•Symbol
•SymNum(Symbol)
•SymNum(?Symbol)
•SymNum("MSFT")
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