How Do Aggregators Handle Data from Exchanges That Are Offline or Reporting Outlier Prices?

Aggregators employ specific logic to handle such data. If an exchange is offline, its data point is simply excluded from the aggregation.

If an exchange reports a price that deviates significantly from the median of all other sources (an outlier), it is typically flagged and ignored or given a much lower weight in the final calculation. This prevents a single compromised source from skewing the aggregated price.