Options flow, free.
Crypto options flow is free on Basis, with no account and no trial. It summarises the public trade feeds of Deribit, OKX and Bybit into taker-bought and taker-sold premium, block trades, premium by strike and expiry, and the largest trades, and it states exactly how much time each feed covers.
What you get
- Premium traded in the window, split into calls and puts and into taker-bought and taker-sold
- Net call and net put premium, and a running total of both through the window so a shift in who is paying shows up as a turn in the line
- Block trades: their count, their premium and their share of everything traded, with a filter that lists only the blocks
- Premium by strike for calls or puts, bought above the line and sold below, restricted to the strikes that carried the flow
- Premium by expiry, separating front-date hedging from positioning in later dates
- The largest trades and the latest trades with contract, taker side, size, price, premium and the trade’s implied volatility where the venue records one
Why this is usually paid for
Options flow is one of the most heavily paywalled products in trading. Seeing large prints and block trades as they happen is exactly the edge people are told they need, and that makes it an easy thing to charge for.
In crypto the trades themselves are public. Deribit, where most crypto options trade, publishes every trade with its side, size, index price and implied volatility, and marks the ones that were negotiated as blocks. Basis pages through a full day of that feed on the server, converts coin-denominated premiums at the index stamped on each trade, and sends everyone the same summary.
The honest limit is coverage. OKX and Bybit publish only their latest trades, which on a busy market can be under an hour and on a thin one can reach back days. Rather than presenting those as a day of flow, the page states the window each feed really covers.
How to use it
- 1
Open Options and choose Flow
The button below opens the options workspace. Choose the Flow tab and pick the venue: Deribit gives a complete day, OKX and Bybit give their most recent trades. The coverage line above the figures says which you are looking at.
- 2
Read the taker side, not a direction
Every venue records the side of the trader who crossed the spread. Taker-bought call premium means someone paid the offer for calls; it does not mean the market is bullish, because the resting side of every trade holds the opposite position and may be hedging it.
- 3
Look at where the premium went
Premium concentrated at one strike and one expiry is a position someone wanted. Premium spread across the front date near spot is more often short-dated hedging. The strike and expiry charts separate the two in a way a total cannot.
- 4
Check the blocks
Block trades are negotiated off the order book and reported to the venue, which is how funds and desks move size. Filter the trade list to blocks and read the strike, expiry and implied volatility of the largest ones before drawing a conclusion from the totals.
Questions
Is the options flow really free, including block trades?+
Yes. The trades come from the venues’ public trade endpoints, blocks included, and Basis summarises them without an account, a trial or a paid tier. There is no delayed free version and faster paid version; everyone sees the same summary, refreshed every minute.
Why does Deribit show a full day and OKX or Bybit much less?+
Because that is what each venue publishes. Deribit lets a reader page back through a day of option trades; OKX and Bybit expose only their most recent trades. Basis shows each window as it is and labels it, rather than stretching a short feed into a figure that looks like a day.
Does taker-bought premium mean traders are bullish?+
Not on its own. It means the aggressor paid the offer, which says who was in a hurry. The seller on the other side may be a market maker who hedges immediately, and a bought put can be protection on a long position rather than a bearish bet. Read the strike, expiry and blocks before the direction.
Is Binance options flow included?+
No. Binance publishes option trades one contract at a time rather than as a combined feed, so summarising its flow would mean reading every listed contract separately on every refresh. Binance options are included in open interest, volume and the chain, just not in the flow summary.
Open it and see
The terminal opens on the options workspace. Nothing to configure, nothing to sign up for.
Open the chartAlso free
Updated 2026-09-14 · All free tools · Indicator reference · Documentation · Terminal