TradeStation's EasyLanguage has a number of restrictions on the use of variable names. Variable names cannot
exceed 20 characters in length, cannot use spaces and cannot use special characters (such as the characters above the
number keys on a standard IBM keyboard). In addition, variable names cannot be one of TradeStation's reserved
words; for example, the variable name delta , which is a TradeStation reserved word, cannot be used for that
purpose. These restrictions make abbreviations necessary for the variables in this article, and some of them may
confuse the reader. To help alleviate any confusion and clarify the article, here's a list of variable definitions.