ForexFeed makes Quote Data available in various formats. Developers are welcome use whichever format they prefer.
CSVA comma-separated values (CSV) is a simple format for storing tabular data (numbers and text) in plain-text form. CSV format is similar to a common spreadsheet; with rows (separated by lines) and columns (separated by commas, or some other character).
XMLExtensible Markup Language (XML) is a markup language that defines a set of rules for encoding information in a format that is both human-readable and machine-readable. Many programming languages or application programming interfaces (APIs) have been developed for software developers to use and to process XML data.