CBOE provides a dataset that categorizes trades by origin and capacity codes, serving as the authoritative source for trade classification. Currently, the dataset offers granularity down to 10-minute intervals. The DDOI, or Derived Data of Interest, is an estimate that must be reconciled with CBOE's data. Presently, the trade classification accuracy stands at approximately 91%. The x millisecond resolution mentioned refers to the average time taken by the backend WebSocket to update new trades, estimate classifications, and deliver results to the user's frontend, rather than the trade classification itself.