TradeStation Help
The symbology for an index symbol is a dollar sign ($) preceding the symbol root.
$[Symbol root]
For example, the symbol for the Dow Jones Index is $INDU.
In the Symbology expressions given in this section, [x] denotes a parameter that should be replaced with a value. The brackets ([ ]) are not a part of the expression. For example, [Symbol root] should be replaced with a symbol, such as ORCL. Items in italics are optional.