Order flow analysis was born on futures, but India's most liquid instruments are index options — NIFTY and BANKNIFTY contracts trade volumes the underlying never sees. The same footprint, delta and big-trade tools work on option premiums; what changes is what the numbers mean.
Three things separate option flow from equity flow. First, every contract is its own market — one strike's footprint tells you about that strike, not the whole board. Second, premium moves for two reasons: the underlying moving, and volatility repricing — aggressive buying in a premium footprint can be a direction bet or a volatility bet. Third, open interest exists: unlike equity, you can see whether trades opened new positions or closed old ones by pairing flow with OI change.
A footprint on a NIFTY option shows aggressive buying and selling of that premium, price level by price level. The patterns transfer directly: absorption at a premium level means someone is happily selling all the option demand there; stacked buy imbalances mean urgency to own that strike. The interpretation adds one question equity never asks: is this flow consistent with the underlying's move, or is it pricing volatility on its own?
The strongest option-flow reads pair the tape with open interest change. Heavy aggressive buying with rising OI = new longs being built. The same buying with falling OI = shorts covering — a very different persistence profile. This is why VolumeLens's F&O tooling shows OI change and walls alongside premium charts rather than as a separate world.
Index options only, front expiry, ATM and one or two strikes either side — that is where liquidity lives and footprints are clean. Deep OTM strikes print sparse, gappy footprints that support no conclusions. VolumeLens covers index F&O order flow (futures and options) for all users; the concepts above are exactly what its AI Mentor narrates when reading an option chart aloud.
Yes — footprint, delta and big-trade detection all apply to any traded instrument, including option contracts. The extra care is interpretive: premium flow mixes directional and volatility motives.
Index options (NIFTY, BANKNIFTY and peers), front expiry, near the money. Liquidity collapses fast beyond that, and thin footprints are unreadable footprints.
Per-contract CVD tracks the running aggressive buy-sell balance of that strike's premium. It is most informative around key strikes, read together with OI change to distinguish position building from unwinding.
Index F&O order flow is available to all users — VolumeLens serves it from its own data pipeline. Stock F&O order flow requires connecting your own broker account.