This is an SDK that allows you to create indicators for the Marketscope 2.0 charting package that is included inside the FXCM Trading Station.
It uses a language called Lua (
http://www.lua.org/) to develop the indicators. The download comes with an editor, debugger, and example indicators.
To obtain this API, please fill out the api request form at
http://www.fxprogrammers.com/api_request.htm