NASDAQ LEVEL II
TIME AND SALES
RTL - The Investor/RT Real
The building blocks of
Scans, Custom Indicators, and Trading Signals
RTL Tutorial, Custom
Indicators, Scans, BackTesting)
The Investor/RT Real Time Language (or RTL) is the language used in
Investor/RT to build Scans, Custom Indicators, or Trading Signals.
RTL is used to formulate expressions for Scans, Custom Indicators, or
Trading Signals, using Data Elements (or Tokens), and Operators.
These RTL expressions can be compared to sentences, in which the Data
Elements (Tokens) are the nouns, and the operators are the verbs. Below are the five categories of elements, along with
special functions and operators, all of which are building blocks of RTL
and are used to create RTL expression. Click on the category heading to see
a list of the elements in that category, along with a brief description of
- Complete List
- A complete alphabetical, printable list of all elements available
for use in composing RTL expressions for Scans, Custom Indicators, and
- Historical Elements - These are
elements which relate directly to historical price and volume
data. All historical elements can be qualified.
- Primitive Elements - These elements only have a current value, and
cannot be qualified.
- Fundamental Elements - These elements represent measures of
performance. All the fundamental elements are transmitted by the
Dial/Data historical service. Certain fundamental elements are
also transmitted by individual data feeds...check with your data
vendor for details.
- Technical Indicator Elements - These elements represent predefined
technical studies. Most studies have additional parameters that
must be specified when the element is added.
- Numeric Constants and Flags - These elements are simply tokens which
represent constant numbers. They exist to facilitate equation
composition. The descriptive tokens are generally easier to
remember than the numbers they represent.
- Special Functions - There are several special built-in functions
that extend the scan language in useful ways by performing arithmetic
or statistical calculations.
- Operators - Arithmetic, Relational,
- Textual String Elements - Some
elements are textual strings and must be compared with quoted
strings. Wildcard characters can be used in the text you are
- Option Analysis Elements - Some
elements are only relevant for studying options.