eSignal Formula Script (EFS) for Programming Your Own Studies
eSignal Formula Script (EFS) is a simple formula language that allows you to create and modify your own studies, as well as modify those in our library of studies. We also have partnerships with a number of developers expert in EFS, as well as other scripting languages. They can work with you to convert existing code into a strategy or to create a strategy from scratch. Here's a list of EFS developers.

Users may also post (and access) EFS suggestions and comments on the EFS Studies Forum.

Our user-friendly Formula Wizard helps you develop your studies and trading systems in eSignal Formula Script (EFS).

EFS means ease of development with few lines of code required, ability to use built-in studies and support for building a study of another study, such as a Moving Average of an RSI.

EFS also includes:

• The EFS Performance Monitor (on the View menu) that lets you monitor the amount of CPU usage of a particular study
• Ability to "talk" to broker plug-ins, so you can develop a study or strategy that can initiate a trading action
• Ability to include a study within a study using "Built-Ins" (e.g., an MOV of RSI), reducing the amount of work involved in creating certain formulas and providing additional CPU relief
• A built-in study-properties editing function that makes changes easy
• Ability to build a study of another study and create studies based on different intervals and symbols
• Fewer lines of code, cutting development time by up to 85 percent