About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Velocimetrics Improves Algo Testing with MdPlay

Subscribe to our newsletter

By Zoe Schiff

Velocimetrics continues to build out its data tracking and performance analysis technologies with the addition of mdPlay, a service that allows subscribers to accurately re-experience the market data sent or received during any selected trading period in their pre-production environment.

Firms using market data provided by mdPlay can improve the precision of testing practices, resolve trading issues more quickly and reduce the possibility of trading systems or algorithms responding in an unintended manner to changing market conditions. In turn, mdPlay can help firms minimise the potential of trading losses and support MiFID II’s algo testing requirements.

Steve Rodgers, head of engineering at Velocimetrics, explains: “With the mdPlay service, firms operating algos can run as many testing scenarios as they like as relevant market data is made available for replay in their test environment. They can build libraries of replays and these can be updated on an ongoing basis, allowing algos to be tested in many scenarios and reducing the possibility of an algo responding in an unexpected manner to a rare combination of events in the market. This supports MiFID II’s objective of limiting the potential of an algo to contribute to disorderly trading conditions and negatively impact the fair and orderly functioning of the market.”

Velocimetrics’ mdPlay avoids the problem of using artificial market data in the testing environment and instead allows subscribers to access actual market data streams that were received at any particular time and use the data in the pre-production environment. Live scenarios can be precisely replicated and engineers can quickly understand why certain components reacted in a particular way and identify a problem’s root cause without the need to trawl through log files. Once a problem has been resolved, testing teams can repeatedly replay the market data in the test environment to ensure systems will react more positively if the same market events reoccur.

Steve Colwill, CEO at Velocimetrics, says: “These days, automated trading decisions are made in small fractions of a second, but software-only capture replay solutions cannot replicate the true timing subtleties of fast moving markets. mdPlay can be up and running within hours, enabling replay of a precise replica of the market conditions experienced during any given trading period. Because the data is replayed with +/-20 nanosecond precision, testing teams can increase the accuracy and effectiveness of functional and load testing practices. This means that when algorithms and their supporting components are released into production, mdPlay users can have a higher degree of confidence in their behaviour, resulting in fewer production problems and more profitable trading.”

Subscribe to our newsletter

Related content

WEBINAR

Upcoming Webinar: Agility as Alpha: How Trading Infrastructure Determines Who Wins in Volatile Markets

Date: 21 May 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes Tariff shocks, geopolitical realignment and macroeconomic regime shifts are redrawing the investment landscape faster than most firms’ technology stacks can keep up. For hedge funds and asset managers, the ability to move quickly into new asset classes, geographies or...

BLOG

Market Data Users Flag ‘Important Gaps’ in EU Consolidated Tape Plans

As the European Union forges ahead with its ambitious plan for a consolidated tape (CT), key market data user groups have raised concerns, identifying “important gaps” in the current framework. In a joint letter to the European Securities and Markets Authority (ESMA) and the European Commission, EFAMA, EPTA, and Protiviti have outlined a series of...

EVENT

Buy AND Build: The Future of Capital Markets Technology

Buy AND Build: The Future of Capital Markets Technology London examines the latest changes and innovations in trading technology and explores how technology is being deployed to create an edge in sell side and buy side capital markets financial institutions.

GUIDE

Regulatory Data Handbook – Fourth Edition

Need to know all the essentials about the regulations impacting data management? Welcome to the Fourth edition of our A-Team Regulatory Data Handbook which provides all the essentials about regulations impacting data management. A-Team’s series of Regulatory Data Handbooks are a great way to see at-a-glance: All the regulations that are impacting data management today A...