A Guide to Spotting Reliable Trade Setups with Bullflow’s Unusual Options Flow
Unusual options flow can be like reading the footprints of institutional traders and insiders. These trades often pop up before news breaks, hinting at where the “smart money” is positioning. But here’s the key: not every big trade is worth chasing. Some are hedges, some are noise. The real edge comes from filtering flow with the right criteria — and that’s where Bullflow makes all the difference.
In this guide, we’ll walk through the core signals that help traders separate strong setups from distractions, plus how Bullflow helps you act on them.
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Why Unusual Options Flow Matters
When a massive sweep order suddenly hits the tape or volume explodes on an option that rarely trades, it makes traders think: “Someone knows something.”
The right flow can tip you off to:
- Upcoming earnings surprises
- Product announcements
- FDA approvals
- M&A rumors
- Or even just strong institutional conviction
But you only gain an edge if you filter carefully. That’s where Bullflow’s scanning tools help you cut through the noise.
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1. Trade Type: Sweeps vs. Blocks
- Sweeps: A trader urgently buys across multiple exchanges to get filled fast. This is aggressive and directional — often the most telling type of flow.
- Blocks: One trade on one exchange. These might be a retail trader making a larger than normal trade, institution executing a large negotiated trade, strategic hedges or spreads, and often carry less directional weight.
Bullflow tip: Prioritize sweeps, especially if they repeat at the same strike or expiration. Blocks require extra confirmation.
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2. Volume vs. Open Interest
One of the clearest signals: when daily volume dwarfs existing open interest.
- If 10,000 contracts trade on an option that had only 500 in open interest, that’s almost certainly new positioning.
- The higher the ratio, the more unusual the activity.
Bullflow tip: Use filters like Volume > OI to instantly spot fresh bets, not stale positions.
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3. Order Aggressiveness: Bid vs. Ask
- Bought at Ask/Above Ask → Strong conviction by the buyer.
- Sold at Bid/Below Bid → Trader eager to exit, or writing contracts.
Bullflow tip: Highlight trades where 70%+ of contracts fill at the ask. That’s urgent money at work.
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4. Clustering & Repetition
One isolated trade is interesting. A flurry of sweeps in the same option within minutes? That’s conviction.
Clusters often mean:
- One institution splitting a large order, or
- Multiple traders piling in on the same bet.
Bullflow tip: Set short-interval alerts (5–15 min) to catch clustering early.
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5. Trade Size & Context
- Large notional trades ($1M+ premium) usually signal institutional intent.
- What’s “large” depends on the stock. 500 contracts might be huge on a small-cap, trivial on an ETF.
Bullflow tip: Filter for trade size relative to open interest and average daily volume.
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6. Multi-Leg Strategies
Spreads and straddles can clutter flow. They’re often hedges or volatility plays — not pure bullish/bearish bets.
Bullflow tip: Focus on clean, single-leg sweeps when looking for directional trades.
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7. Aligning with Catalysts
Even the juiciest flow is stronger with a catalyst.
- Earnings next week? Big short-term calls could be bets on a beat. (Important: We highly recommend avoiding trading a stock on or before it's earnings date, no matter what. It's extremely risky!)
- FDA decision upcoming? Call sweeps may be insiders leaning bullish.
- No obvious catalyst? Sometimes that’s the biggest tell — hidden news could be around the corner.
Bullflow tip: Always cross-check flow against upcoming events and chart setups.
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8. The Multi-Factor Edge
The best setups check multiple boxes:
✅ Sweep order
✅ Volume > OI
✅ At/Above Ask
✅ Large size
✅ Repeated in short timeframe
✅ Catalyst on the horizon
When these align, odds shift dramatically in your favor. Bullflow’s filters and alerts make it easy to track these confluences in real time.
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Real-World Examples
- Zendesk Buyout: Traders loaded up on far OTM calls just before a surprise acquisition. Flow showed urgency, OI confirmation, and short expiry. The next day, those contracts exploded in value.
- Tesla Sweeps: A cluster of call sweeps with volume > OI foreshadowed a major move higher within days.
- Boston Scientific Earnings: Unusual call buying weeks before earnings aligned perfectly with a bullish catalyst.
These setups weren’t random — they matched the multi-factor profile Bullflow helps uncover.
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Key Takeaways
- Don’t chase every big trade. Filter smartly.
- Sweeps > Blocks for directional intent.
- Volume > OI confirms new positioning.
- Aggressive ask-side buys show conviction.
- Clusters mean urgency.
- Catalysts give context.
With Bullflow, you don’t just see unusual options activity — you see the right activity. That’s how you trade alongside institutions instead of against them.
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Important Final Note
Unusual options flow is a radar. It doesn’t give you certainty, but it points you toward where smart money is moving. When combined with catalysts, technicals, and risk management, it becomes one of the most powerful tools in a trader’s arsenal.
With Bullflow, you can filter out the noise, spot high-quality setups, and trade with confidence — just like the pros.
Happy whale watching 🐳
