HoloMetrics

HoloMetrics treats a trading card collection as a portfolio rather than as a list. A NestJS API and a Nuxt front end sit directly over the HoloCore data platform, answering the questions an owner actually has about a holding at any given point in its recorded price history.

Valuation resists any simplification. Every position carries its own price history, updated at different times and from different sources, and a portfolio view has to reconcile all of them together into a single figure that remains defensible at any chosen point in the past.

That pushes the work toward time-series modelling, and toward keeping aggregate views responsive without recomputing history on every page load. What a holding is worth matters less to an owner than whether the number behind it can be explained afterwards.