A system includes a remotely-located server that implements components including metric server adapter and a metrics application. The metric server adapter manages governing logic of an evaluation service and predefined instructions that pertain to the evaluation service and/or data used to provide the evaluation service. The metrics application executes the evaluation service in coordination with the metric server adapter. The remotely-located server receives or retrieves a transaction data set. The metrics application obtains time-dependent metric data including market reference price data for one or more responsive items. The metrics application dynamically discovers a difference in the attribute data and the metric server adapter contextually defines transaction-specific instructions for adapting the metric data. An adjustment value applied to the market reference price data transforms the market reference price data. Transaction-specific market reference price data values are exposed to one or more computing devices in communication with the remotely-located server.