This is API (Application Programming Interface) for automating FOREX trading with FXCM (http://www.fxcm.com) accounts. It relies on network protocol used for first generation of FX Trading Station which is no longer used by FXCM so the API is not functional anymore.
The API has been developed by reverse enginnering network traffic between FX TradingStation (former FXCM's trading platform) and FXCM's servers. The API substitutes client side of FX TradingStation (FXTS) system so FXCM servers treat Python code using this API as regular FXTS session.
The API has been developed in time when automated trading was not available to retail traders as access to API was too expensive (deposit on account bigger than $100k). Nowadays trading platform client side API is open to all traders.