Unusual options flow, as it prints
Sweeps, blocks, and whale-sized bets, tagged and timestamped.
What counts as unusual options activity?
A print gets flagged when its volume runs far above the open interest already sitting at that strike, or when the way it fills points to one buyer pushing size through fast rather than the usual back-and-forth of market making. OpticAlpha reads every qualifying trade as it hits the tape and stamps it with one of four tags, so you can scan a row and know what you are looking at without reading the fine print. A sweep is an order sliced across multiple exchanges to fill immediately, which usually means the buyer wants the position on before price moves against them. A block is a single large print, often negotiated off-exchange or filled against a resting institutional order. Unusual covers anything with volume well past open interest that doesn't fit either of those patterns. And a whale tag marks the largest premium prints of the day, regardless of whether they filled as a sweep or a block.
Open interest is the anchor for all of it. A thousand-contract order against ten thousand open contracts is routine flow passing through a liquid name. The same order against three hundred open contracts is new money showing up where the position wasn't already crowded, and that is usually worth a second look. Size on its own doesn't tell you that story. Size measured against what was already there does.
What OpticAlpha shows
Live flow feed
Every qualifying print streams in as it fills, tagged Sweep, Block, Unusual, or Whale, with ticker, strike, expiry, and premium on one row. The feed keeps a rolling window of the most recent 100 trades so you can scroll back through the session without losing the thread.
Max pain by expiry
Pick any expiration on a ticker and see the strike where the largest number of contracts finish worthless. The chart updates as the chain moves, giving you a gravity point to weigh against wherever price is trading right now.
Active options table
The top 25 tickers by dollar notional for the day, ranked with PUT% skew and relative notional side by side, so you can tell a name that is genuinely busy from one that is just acting like itself.
How traders use this
This is the raw flow that options traders lean on to catch institutional positioning before it shows up in price. A whale-sized sweep on a short-dated, out-of-the-money call in a name that wasn't otherwise active is the kind of print that gets a ticker onto a watchlist fast. Nobody pays up for immediate fills on size like that without a reason, and the reason is usually a directional bet on news the rest of the market hasn't priced in yet.
Max pain works the same way heading into expiration week. Price tends to drift toward it as market makers hedge their own book into the close, not because of any conspiracy, just because that is the strike where the least money changes hands across the open contracts. Treat it as a lean, not a law: useful context for where price might settle, not a target to trade blind.
Put/call skew tells you the mood of the day. A PUT% reading above 60% on the active table points to broadly bearish positioning across that session. Relative notional does the same job for size: it compares today's dollar flow in a name against what is normal for it, so a stock running three times its usual notional on an otherwise quiet day means more than the same multiple on SPY, which trades heavy every single day regardless.
Terms on this page
- Sweep
- An options order split across multiple exchanges to fill quickly, usually signaling the buyer wants urgency over the best price.
- Block trade
- A single large options print, often negotiated privately or filled against a resting institutional order.
- Whale
- OpticAlpha's tag for the largest premium prints of the day, regardless of whether they filled as a sweep or a block.
- Open interest (OI)
- The number of options contracts at a given strike and expiry that remain open. Volume far above OI is one signal of new, not closing, activity.
- Max pain
- The strike where the total value of expiring options contracts is lowest for buyers and highest for sellers. Often acts as a price gravity point into expiration.
- Notional
- The total dollar value of an options trade or a day's flow in a ticker, used to rank which names are seeing the most real money move.
- Put/call skew
- The share of flow going to puts versus calls. A PUT% reading above 60% on the active table suggests broadly bearish positioning that day.
Questions traders ask
What counts as unusual options activity?
A trade is flagged unusual when its volume runs well above open interest, or when its size and structure suggest one buyer or a coordinated group is behind it rather than routine market making. OpticAlpha tags each print as Sweep, Block, Unusual, or Whale so you can tell the difference at a glance without reading every row's details.
What is a sweep versus a block trade?
A sweep is an order that gets sliced across multiple exchanges to fill fast, usually because the buyer wants the position on before price moves against them. A block is a single large print negotiated off-exchange or through a large resting order. Sweeps tend to signal urgency; blocks can be either urgency or a hedge from a large fund.
What is max pain and why does it matter near expiration?
Max pain is the strike price where the largest number of options contracts expire worthless, meaning option buyers lose the most and option sellers lose the least. It is not a rule, but price does drift toward it more often than chance would suggest as expiration approaches, since market makers hedging their own book add pressure in that direction.
How current is the options flow feed?
Flow prints stream in continuously through the trading session, with each row timestamped to when the trade hit. The feed keeps the most recent activity at the top and holds a rolling history so you can scroll back through the session.
What does REL NOT mean in the active options table?
Relative notional compares today's dollar flow in a name against its normal average. A ticker running 3x its typical notional on a otherwise quiet day is a stronger signal than the same multiple on a name that always trades heavy, like SPY.
See unusual flow the moment it prints
14-day free trial. No credit card required.