What unusual options activity means

Options Sentiment Screener, 28 September 2026

Roughly forty million options contracts change hands on a normal US trading day. Nearly all of that is routine: market makers hedging, funds rolling positions, retail traders buying a few contracts at a time. A small part of it is not routine. Somebody buys ten thousand calls in a name that usually trades a few hundred, or pays above the ask for puts expiring on Friday, or sweeps every exchange at once to get filled before the price moves. That part is unusual options activity, and it is what Options Sentiment Screener collects.

Why anyone reads it

An options trade is a statement with a deadline. Buying a call is a bet that the stock will be above the strike by the expiry; buying a put is the opposite bet. When the statement is large, urgent and new, it says something about what a well funded participant expects and when they expect it. That is information a stock chart does not carry, because the chart shows what the price did and the flow shows what someone was willing to pay for what the price might do.

Nobody knows who is behind a print. The tape does not carry names. What it carries is size, money, urgency and timing, and those are enough to tell a routine trade from one that deserves a second look.

What makes a print unusual

A print is one executed trade. It becomes unusual when it stands out from the normal activity in its contract, and there are four ways it can do that.

Size. A trade of several thousand contracts in a contract that usually sees a few hundred a day is unusual by definition. Size on its own is the weakest signal, because a big trade in a heavily traded index option is still routine.

Size relative to open interest. Open interest is the number of contracts already outstanding. A trade larger than the open interest cannot be a position being closed; it is new. New positioning is what carries information, and the app marks these prints and lets you filter to them.

Premium. Premium is the money behind the trade: contracts times the option price times one hundred. It is the figure printed large on every row of the tape, because it is the figure that says how much conviction was actually funded. Ten thousand contracts of a five cent option is fifty thousand dollars. Five hundred contracts of a twenty dollar option is a million.

Execution. A trade that pays above the ask, or is swept across several exchanges to fill immediately, cost more than it needed to. Someone who pays that cost wants the position now, and urgency is a signal in itself.

Reading one print

Every row on the tape shows the ticker, the contract, the size, the premium, the sentiment colour and the conviction tier. Tap it and the detail sheet adds the open interest, today's volume, the execution label (above ask, at ask, at midpoint, at bid, below bid), the bid and ask at the time, where in the spread the trade printed and the stock's quote.

The habit to build is to read the print as a question rather than an answer. A million dollars of calls expiring in three weeks, bought above the ask, in a stock with earnings in two weeks, is a clear statement: the buyer expects a move up around the report. A million dollars of puts in a stock that has doubled this year could be a bear, or could be a holder buying protection on a large gain. The flow tells you that money moved. It does not tell you why.

Reading the day

A single print is an anecdote. The Pulse turns the session into a picture: net premium (bullish minus bearish), tracked premium, the put call ratio by premium, the share of prints that were sweeps, the tickers with the most unusual premium and the whale of the day. Read the Pulse first, then the Whales board, then the tape for any name you care about.

The tape itself is best read filtered. The chips above it isolate calls, puts, sweeps, bullish, bearish, premium above a threshold, same day expiries and size over open interest, and a saved screener keeps a combination you use often one tap away.

Where it misleads

Three habits keep options flow useful.

First, ask what else the trade could be. Puts can be protection, calls can be hedges against a short, and a print can be one leg of a spread whose other legs executed elsewhere. The execution detail helps: a trade at the midpoint tells you less about who initiated it than a sweep above the ask.

Second, look at the expiry. A print in a contract expiring this week is a view about the next few days, often about a known event. A print six months out is a different kind of statement. The screener separates the two.

Third, weigh the print against the stock. Ten million dollars of calls is a large commitment in a mid cap and a rounding error in the largest companies in the market. Premium relative to the stock's typical dollar volume is the better measure of how much a print matters.

Read the flow, ask why, and hold the answer loosely.