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FYERS History API — historical/delisted stocks, old symbols, ISIN changes and corporate actions (2021–2025)

calendar_today October 24, 2026 person @MUKUNDHAN_57618573 MUKUNDHAN domain upstox

Hi FYERS Team, I’m evaluating the FYERS History API for personal NSE cash-equity historical research and offline backtesting. I understand the API provides historical OHLCV data, but I need clarification about securities whose identities changed or which are no longer listed. Could someone from the API/data team clarify these points?

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