The Millistream Sandbox is a production-like test environment. We use an actual feed log from a historical trading day as the source of the data and it’s sent in ”real time”, which basically means that the exchange data will have the same timing as on an actual trading day.
All Millistream products, like the Millistream Web Service (MWS), the Millistream streaming API and the Millistream Database, are possible to use with the Sandbox. An application developed using Sandbox data can simply switch to a production account/URL and be live in minutes.
The data is filtered and not all exchanges and other sources available in the Millistream feed are possible to test in the Sandbox.