I use the DhanHQ Data API (Expired Options Data, endpoint /v2/charts/rollingoption, interval 1, expiryCode 1, requiredData strike/oi/spot, strikes ATM-10 to ATM+10, CALL and PUT). For the days below the rest of the trading session returns complete 1-minute rows, but the open interest for ONE minute is missing, or no candle is returned at that minute for some strikes. BANKNIFTY: 13 Oct 2025 14:33; 16 Feb 2026 14:11; 19 Mar 2026 14:35; 10 Apr 2026 12:35; 16 Apr 2026 12:36. SENSEX (BSE): 30 Oct 2025 14:08; 19 Mar 2026 14:35; 10 Apr 2026 12:35; 16 Apr 2026 12:36. NIFTY: 16 Apr 2026 12:36. Questions: (1) Is this a known gap in the expired options data for these dates? (2) Is there a different request (parameters, strike offsets, interval) that returns the OI at those minutes? (3) If the data is not held, can the team confirm that in writing? Support ticket: #6535106. Happy to share request/response samples. Thank you.