eSignal, an Interactive Data company, offers its eSignal suite of products and services, as well as trading education, global, real-time market data and decision support tools to individual and active traders worldwide. eSignal provides streaming data from financial markets and allows users to examine the data using fundamental analysis

Fundamental analysis

Fundamental analysis of a business involves analyzing its financial statements and health, its management and competitive advantages, and its competitors and markets. When applied to futures and forex, it focuses on the overall state of the economy, interest rates, production, earnings, and...

 and technical analysis

Technical analysis

In finance, technical analysis is security analysis discipline for forecasting the direction of prices through the study of past market data, primarily price and volume. Behavioral economics and quantitative analysis incorporate technical analysis, which being an aspect of active management stands...

.
eSignal, a Windows-based application, uses JavaScript

JavaScript

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

 as the basis for the scripting language that programmers and traders can use for building custom indicators. This, in effect, includes eSignal users in the base from which to draw programmers for writing indicators.

Add-ons

There are companies that provide add-on indicators that can be used in eSignal. Most of these add-ons are written in the eSignal EFS script language (a superset of JavaScript) with extensions written in any language and compiled to a DLL.

The eSignal EFS script language

The eSignal scripting language, EFS, a derivative of JavaScript, can be used to create new formula studies or modify the formulas and studies that come with eSignal.

The other eSignal products and services

eSignal provides streaming, real-time market data, news and analytics. The other products offered under the eSignal brand include eSignal, Advanced GET Edition, and eSignal OnDemand, as well as a browser-based version -- LiveCharts -- and QuoTrek -- for use on mobile devices and smart phones.

The datafeed provides real-time, delayed or end-of-day data for stocks, futures, options

Option (finance)

In finance, an option is a derivative financial instrument that specifies a contract between two parties for a future transaction on an asset at a reference price. The buyer of the option gains the right, but not the obligation, to engage in that transaction, while the seller incurs the...

, indices, foreign exchange

Foreign exchange market

The foreign exchange market is a global, worldwide decentralized financial market for trading currencies. Financial centers around the world function as anchors of trading between a wide range of different types of buyers and sellers around the clock, with the exception of weekends...

 and treasuries, depending on the package. eSignal Premier has real-time market data for stocks

Stock exchange

A stock exchange is an entity that provides services for stock brokers and traders to trade stocks, bonds, and other securities. Stock exchanges also provide facilities for issue and redemption of securities and other financial instruments, and capital events including the payment of income and...

 and futures from U.S. and international markets. eSignal Premier Plus adds options data to that. An end-of-day (EOD) product, eSignal OnDemand, is delayed snapshot data available on demand for one region or all regions.
eSignal, Advanced GET Edition, couples eSignal’s market data, back testing and trading strategy tools with a proprietary set of indicators, including the Elliott Oscillator, eXpert Trend Locator and False Bar Stochastic. Its rules-based set-ups include the signature Advanced GET Type 1 and 2 trades.

QuoTrek is global, streaming, real-time market quotes, charts and news accessible via the iPhone, BlackBerry, Android and Java-enabled devices. It can be added to eSignal, eSignal, Advanced GET Edition, and LiveCharts without incurring extra exchange fees so that users can stay in touch with the markets wirelessly.

The browser-based service -- LiveCharts -- provides streaming, real-time quotes from world markets, streaming charts, news, market depth

Market depth

In finance, market depth is the size of an order needed to move the market a given amount. If the market is deep, a large order is needed to change the price. Market depth closely relates to the notion of liquidity, the ease to find a trading partner for a given order: a deep market is also a...

 and other tools to active traders. It also has a version of the software for the agricultural market.