R | Trader is Rithmic's front end trading and real time risk management screen. With R | Trader you can view quotes, market depth and option strikes in real time, place trades and pull orders, and view order history, performance, positions and risk limits. FCM and IB administrators use R | Trader to do all that traders can on behalf of any of their users and accounts. Administrators can set risk limits, activate and deactivate users and accounts and record fills and cancels whose execution has been made outside of the Rithmic trade execution software.

R | Manager is Rithmic's user id and account creation screen. FCM and IB administrators use R | Manager to create Rithmic user ids and accounts for their clients who trade using Rithmic's trade execution software.

R | API is a collection of C++ and .NET software libraries and interface definitions. Developers and screen designers incorporate R | API into their proprietary software to gain access to the Rithmic trade execution software infrastructure. R | API provides its callers with a normalized view of market data, reference data and order and execution reports across all supported exchanges. Additionally, R | API provides latency information about the market data and trade reports it receives so that a proprietary algorithmic trading program incorporating R | API may take immediate action if such latency exceeds its own thresholds.

The Rithmic trade execution software infrastructure supports users from different FCMs concurrently. In an installation used exclusively by one algorithmic trading group, client programs built on R | API (as depicted by the green box in the lower right hand part of the diagram) connect to the infrastructure from inside the firewall (above the red rectangle), avoiding any of its latency.