Options Flow Tape: How to Read Sweeps, Blocks & Unusual Activity
- Options Flow shows live institutional options prints — sweeps, blocks, and unusual activity — 15-min delayed.
- Sweeps are aggressive multi-exchange orders (high urgency). Blocks are large single-exchange prints (may be hedges).
- The Bias Bar shows the running call vs put premium tilt for the session.
- Filter by minimum size to cut retail noise and focus on what moves markets.
What is the Options Flow Tab?
The Options Flow tab shows a live tape of large options trades — every significant print above a size threshold, with details: time, ticker, strike, expiration, call/put, size (contracts), premium paid, type (Sweep/Block/Unusual), and sentiment direction.
Unlike the GEX Profile chart, which shows you the aggregate structural picture (how much gamma is stacked at each strike), the Options Flow tape shows you the individual prints that are building that structure in real time. You see each institutional order as it hits the tape — when it happened, how large it was, and what type of execution it used.
Data is 15-minute delayed on the current plan. Options Flow is available on the Trader plan. This feature gives you the granular view that GEX flow alone cannot: not just that gamma is building at $675, but that a 3,000-contract call sweep hit the tape at 10:42 AM and pushed it there.
Sweeps vs Blocks vs Unusual
The three print types in Options Flow carry very different trading implications. Understanding the distinction is essential to reading the tape correctly.
| Trade Type | Definition | Trading Significance |
|---|---|---|
| Sweep | Multi-exchange aggressive order, fills across multiple venues simultaneously | High urgency — institutional is buying NOW and doesn't care about slippage. Strongest directional signal. |
| Block | Single large print on one exchange | May be hedge, spread leg, or covered call. Less directional on its own without corroborating signals. |
| Unusual | Size significantly above average OI at that strike | New positioning being built at that strike — something is accumulating that wasn't there before. |
The reason sweeps carry more urgency signal than blocks is execution intent. A sweep order intentionally crosses multiple exchanges to fill immediately — the trader accepts worse pricing in exchange for speed. That urgency implies conviction: the institution needs the position NOW, before the anticipated move happens. A block trade on a single exchange could be a negotiated transaction, the leg of a complex spread, or a hedging operation — any of which reduces its directional value in isolation.
The Bias Bar
Below the filter controls is the Bias Bar — a running tally of call premium vs put premium for the current session. It is not a contract count; it is a dollar-weighted measurement. If calls are being bought aggressively at high premiums, the bias bar will tilt green even if fewer total call contracts traded than put contracts.
Green indicates calls dominating the session's options spending. Red indicates puts dominating. The bar updates with each new print that registers in the tape, giving you a live read on where institutional capital is flowing in aggregate.
The most powerful configuration: the Bias Bar heavily favors calls AND the GEX structure shows the Call Wall nearby. When institutional spending (captured by the Bias Bar) and structural levels (captured by GEX) align, you have both capital conviction and mechanical reinforcement in the same direction — the highest-conviction setup the tape can produce.
Bias shifts mid-session are equally important. A Bias Bar that opens neutral and gradually shifts to heavy puts through the afternoon is an early warning signal. These mid-session bias reversals can precede price moves by 15–30 minutes as institutional positioning adjusts before the market catches up.
Filtering by Size
The size filter dropdown sets the minimum contract size shown in the tape. The default threshold filters most retail noise, but on an active day you may still see 50–100+ entries. Increasing the filter raises the floor, showing only the largest prints.
For SPY on a normal trading day:
- 500+ contracts — institutional scale, worth attention
- 1,000+ contracts — significant institutional positioning
- 2,000+ contracts — major position, highest signal value
The practical value of the size filter is noise reduction. On an active day in SPY, the unfiltered tape can show 200+ entries. Only 3–4 of those prints will be truly significant in terms of moving the GEX structure or signaling directional institutional conviction. Raising the size filter to 1,000+ cuts the tape to those highest-signal prints, making pattern recognition far easier.
Scale these thresholds proportionally for smaller underlyings — AAPL and MSFT institutional scale differs from SPY, and single-name stocks have meaningfully different liquidity profiles. What constitutes an "unusual" print depends on the average OI for that strike, which the Unusual flag already factors in.
Reading the Tape in Context
The Options Flow tape is most powerful when read in the context of the broader GEX structure. An isolated sweep means something; a sweep aligned with a structural level means considerably more.
Key patterns to watch:
- Call sweeps above the current Call Wall — positioning for a wall break. If price is at $668 and the Call Wall is at $670, call sweeps above $670 suggest institutions expect a break through, not a rejection at the wall.
- Put sweeps at the Put Wall — defending the structural floor. Institutions are adding put exposure at the level where dealers are already long gamma — reinforcing the floor rather than anticipating a break below it.
- Multiple same-strike sweeps within 30 minutes — accumulation. This is the most reliable tape pattern: not a one-off trade, but a deliberate, sequential build of a position at a specific strike. Each sweep adds to the prior one. This is institutional conviction being expressed in real time.
- Sweeps against the structural wall direction — potential rejection trade. If call sweeps are firing at the Call Wall but you know from GEX that the wall is extremely heavy (thick gamma), those sweeps may be fading rather than breaking. The wall breaks, or it doesn't — the tape gives you the positioning on both sides.
Access live Options Flow data
Live options flow tape with sweeps, blocks, and unusual activity. Institutional-grade tape reading for serious options traders.
Frequently Asked Questions
Is the flow data real-time?
Options Flow data is 15-minute delayed on the Developer data plan, which is GEXBoard's current tier. For structural analysis — identifying accumulation patterns, bias shifts, and wall-aligned positioning — 15-minute delayed data is sufficient to understand the day's institutional activity. Scalpers attempting precise entry timing based on the tape may find the delay challenging for short-duration trades.
What's the minimum size threshold?
The default threshold is tuned to filter out retail noise and surface institutional-scale activity. Focus on the largest prints in the tape — they represent the most significant positioning changes and carry the highest signal value for understanding where large capital is being deployed. Use the size filter dropdown to raise the floor further on high-volume days when the tape becomes crowded.
How is this different from GEX Flow?
Options Flow is the individual trade tape — each specific print: who bought what strike, when, at what size, using what execution method (sweep/block). GEX Flow is the aggregate net GEX evolution over the session — the cumulative result of all that options activity on dealer positioning. Options Flow shows the inputs; GEX Flow shows the output. Both are complementary: use Options Flow to understand the institutional activity driving positioning changes, and GEX Flow to see the net structural effect of that activity on dealer hedging.