The time window size for fetching financial events data in chunks for the ListFinancialEvents and ListFinancialEventGroups streams. Options include hourly (1H, 6H, 12H) and daily (1D, 7D, 14D, 30D, 60D, 90D, 180D) granularity. - Hourly step sizes (e.g., 1H, 6H) are recommended for very high data volumes where daily windows cause pagination token expiration (TTL errors). They fetch smaller chunks per request, reducing the risk of timeouts.