NIFTY Options 1-Second Data (Options + Spot Packs)

No, and the distinction matters. This is a 1-second bar series: for each second in which the contract traded you get open, high, low, close, volume and open interest. True tick-by-tick data is every individual trade print with its own timestamp, which is a different product that we do not sell. Anyone selling you "tick data" for Indian options should be asked which of the two they mean.

Cost of acquisition. The broker APIs that serve second-level data cap requests at a few thousand calls per day, and a single trading day of a full option chain at 1-second resolution consumes thousands of those calls. Building three years of it is a multi-year job at the documented rate limit, which is why the archive was built continuously rather than on demand.

No, and neither can anyone else. The source API serves second-level history on a rolling window of roughly three years. Days older than that window are gone upstream permanently. This is also why the earliest days we do hold are the most valuable part of the archive.

The coverage table above shows the live total. As a rule of thumb, a 1-second option chain is two to three orders of magnitude larger than the same day at 1-minute, which is why it is delivered as Parquet rather than CSV.

If your strategy holds for hours and exits at a limit price, 1-minute is enough and cheaper. If it trades expiry-day gamma, measures slippage, models queue position, or exits within seconds of a signal, 1-minute bars will overstate your fills and your backtest will not survive contact with the live book.

Option files up to 29 Jun 2026 hold one expiry per trading day (the nearest weekly, calls and puts, strikes around the money); from 30 Jun 2026 each day has three expiries (the nearest weeklies plus the current monthly). Open interest is on every row. This is narrower than the 1-minute product, which carries every live expiry.

Option files dated 2 Jan 2023 – 29 Jun 2026 use layout B, including an iv column taken as-is from the data feed (not independently verified); option files from 30 Jun 2026 use layout A (13 columns, no iv). Spot files carry OHLC plus atm_strike, straddle and straddle_iv. No Greeks, no bid/ask, no 1-second futures.

Pick a NIFTY 1-second pack on the homepage (per calendar year, last 3 months, or the whole archive) and pay by UPI. Packs that run past what is already in storage say so on the card: what is held downloads right away and the rest follows as a free updated link. For a single expiry day or a custom window, use the request form.