Tradytics Learn

Plain answers to what traders ask about options flow, dark pool prints, gamma and the greeks, with real examples from today's market and how to see each one live.

Options flow

  • What is options flow?: Options flow is the live record of large options trades on US exchanges: what traded, how much was paid and which side was aggressive. It shows where money went, not why.
  • What is unusual options activity?: Unusual options activity is trading far bigger than normal for one contract, usually more volume than open interest, which points to a new position. It shows conviction, not intent.
  • How to read options flow, step by step: Read each row in order: what traded, when it expires, strike vs price, premium, side, size vs open interest and trade type, then the context. One real QQQ trade, walked through.
  • What makes an options trade unusual?: A trade is unusual when it's big for that contract and stock: size above open interest, large premium for the name, an aggressive fill, and often a short expiry or a far strike.
  • Does following unusual options activity work?: Not as a standalone signal. Unusual options activity shows where big money went, but much of it is hedges, spreads or closing trades. It works best as context for an idea you already have.
  • Is unusual options activity a sign of insider trading?: Rarely. The SEC does charge people who buy short-dated out-of-the-money calls before takeovers, but nearly all unusual options activity is hedging, spreads and ordinary bets.
  • How to tell if an options trade was bought or sold: Compare the trade price with the bid and ask when it printed: at or above the ask, a buyer paid up; at or below the bid, a seller hit it. Mid prints can't be called either way.
  • How to tell if a big options trade is a hedge: A big trade is likely a hedge when it's puts on an index or ETF, months out, near the price, paired with other legs or bought into a drop. Real October 30, 2026 examples.
  • Opening vs closing: how to tell from the flow: If a trade is bigger than the contract's open interest, at least part of it must be new. Otherwise the tape can't tell you: check whether open interest rises or falls at the next update.
  • What "at the ask" and "at the bid" mean in options flow: "At the ask" means a buyer paid the sellers' price: an aggressive buy. "At the bid" means a seller took the buyers' price: an aggressive sell. Mid prints have no clear side.
  • Is a put sweep bullish or bearish?: It depends on the side. A put sweep bought at or above the ask leans bearish or is a hedge; one sold at or below the bid leans bullish. A sweep at the mid has no clear lean.
  • What is an options sweep?: An options sweep is one large order that fills against the best prices on several exchanges at once. Traders read it as urgency; it doesn't show whether the trade opened or was a hedge.
  • What is a block trade in options?: An options block trade is one very large trade printed in a single piece, usually negotiated first and then crossed on an exchange. Tradytics marks any single trade of 5,000+ contracts as a block.
  • Sweep vs block vs split: what's the difference?: A sweep fills one order across several exchanges at once, a block is one huge trade in a single print, and a split is a big order filled in pieces on one exchange. None shows direction alone.
  • What is a golden sweep?: A golden sweep is a vendor label for a large options sweep, usually $1M or more in premium, filled at or above the ask. It flags a big, urgent buy, not whether it opened a bet or a hedge.
  • Why premium matters more than the number of contracts: Premium (contracts x price x 100) is the money actually spent, so it shows real size. Contract counts mislead because an option can cost $3 or $400 a share. Check intrinsic value next.
  • How to filter options flow and cut the noise: Filter options flow in this order: a premium floor sized to the stock, an aggressive side, size bigger than open interest, an expiry that fits your timeframe, and no spreads. Then group by ticker.
  • Volume vs open interest: what's the difference and why it matters: Volume is contracts traded today; open interest is contracts still open after the last close, counted by OCC once a day. Volume above open interest means at least part of today's trading is new.
  • What big call buying before earnings means: Big call buying before earnings is usually a bet on a rally, but implied volatility collapses after the report, so the stock must rise more than the inflated premium. Call selling often offsets it.
  • Why would someone buy millions in far out-of-the-money calls?: Big far out-of-the-money call buys are a cheap, capped-risk bet on a big move, one leg of a call spread, a hedge for a short position, or short calls being closed. Check for a sold leg first.
  • What are 0DTE options?: 0DTE options are contracts traded on the day they expire. SPX, SPY and QQQ now expire every weekday, and same-day trades were a record 66.2% of SPX options volume in July 2026.
  • How to read 0DTE options flow: Read 0DTE flow as a live map of positioning for today's close, not a forecast: where same-day premium piles up by strike, which side it hits, and whether dealers are long or short gamma.
  • What is net options flow (net premium)?: Net options flow (net premium) is bullish-leaning premium minus bearish-leaning premium: calls bought and puts sold, minus puts bought and calls sold. Mid-price trades count for neither.
  • How to read spreads and multi-leg trades in the flow: A spread shows up as matching prints at the same moment in different strikes or expiries. Read the legs as one trade: net cost and max gain or loss, not the headline premium of one leg.
  • How to use options flow for swing trading: For swing trades, follow new, one-sided options positions that expire weeks to a few months out and repeat across sessions, confirm with next-day open interest, and time entries with levels.
  • What short-dated vs LEAPS options flow tells you: Expiry is the trader's deadline. Short-dated flow is a bet or hedge on a near move and the noisiest; LEAPS flow (9 months to 3 years) is often a stock substitute or long hedge.
  • Where does options flow data come from?: Options flow comes from OPRA, the consolidated tape of every US options exchange's trades and quotes. It shows price, size and exchange, but not who bought or sold, so tools infer the side.
  • How beginners should use options flow: Beginners should use options flow to find and study ideas, not to copy trades: read side, size vs open interest and expiry, rule out spreads and hedges, keep risk small and skip 0DTE.
  • Why options flow alerts seem to come after the move: Flow alerts seem late because much flow reacts to moves already made, big moves happen before options trade, many feeds are delayed, and hindsight picks winners. The tape itself is fast.
  • Is paying for options flow worth it?: Live options flow is worth paying for if you trade options during market hours and use it for context, not copy trades. Swing traders and beginners can usually start free on yesterday's data.

Dark pools

  • What is a dark pool?: A dark pool is a private stock trading venue, legally an alternative trading system run by a broker-dealer, that hides orders before they fill and reports every trade to FINRA after.
  • Are dark pools legal?: Yes. Dark pools are legal, regulated venues: SEC Regulation ATS requires a registered broker-dealer operator, FINRA membership, public Form ATS-N disclosure and every trade reported.
  • Why do dark pools exist?: Dark pools exist because showing a big order moves the price against you. Hiding it until it fills cuts price impact and information leakage, at the cost of a less certain fill.
  • What are dark pool prints?: A dark pool print is the public record of an off-exchange stock trade, reported to FINRA after it executes: price, shares, time and condition codes, but never who bought or sold.
  • How to read dark pool prints: Read dark pool prints in bulk: drop prints far from the market price, set aside closing-price trades, compare size with a usual day, then watch where dollars cluster over days.
  • Are dark pool prints bullish or bearish?: Neither on their own. Every print has a buyer and a seller, and the record doesn't say who started it. Prints far above or below the market are usually late or closing-price trades.
  • What are dark pool levels, and do they act as support?: A dark pool level is a price where unusually large off-exchange dollars traded over recent sessions. Traders watch levels as support or resistance, but they are maps, not floors.
  • How much stock trading happens in dark pools?: Dark pools (ATSs) handle about a tenth of US stock volume: 10.7% in early 2023, per the SEC. All off-exchange trading, wholesalers included, was about 44%: the 'nearly half' figure.
  • Is dark pool data real time?: No. Off-exchange trades are reported to FINRA after they execute, and the biggest are often reported late at earlier prices. Read dark pool data for levels, not for timing.
  • What is a late or out-of-sequence dark pool print?: A late print is an off-exchange trade reported over 10 seconds after it executed, often a block priced off an earlier moment. It hits the tape out of order and says little about the price now.
  • Are there dark pools for options?: No. US listed options trade on exchanges and every trade goes out on OPRA, the options tape. Even giant negotiated blocks are crossed on an exchange and show up when they trade.
  • Does my order go through a dark pool?: Usually not a dark pool, and usually not an exchange either: most retail stock orders go to wholesalers that fill them off-exchange. Your broker's Rule 606 report shows where orders went.
  • Who trades in dark pools?: Mostly institutions (pension funds, mutual funds, hedge funds) and the brokers trading for them, in pools run by banks and brokers. Individual traders rarely touch one, and no print names the buyer.
  • Dark pool vs lit exchange: what's the difference?: A lit exchange shows bids and offers before a trade and prints it at once. A dark pool hides orders until they fill, prices off the exchanges, and reports each trade to FINRA afterward.
  • Is off-exchange or short volume the same as dark pool volume?: No. Off-exchange volume includes dark pools and wholesalers. FINRA's short sale volume is the short-marked part of that volume, not short interest, and it overstates real shorting.
  • Block trades vs dark pool prints: A block trade is about size; a dark pool print is about venue. Blocks can print on an exchange or off it, dark pool prints come in any size, and the biggest print of a day is often a closing auction.

Options basics

  • The options greeks explained: The greeks show why an option's price changes: delta for the stock, gamma for how delta shifts, theta for time and vega for implied volatility. Each explained with a real example.
  • What is delta in options?: Delta is how much an option's price moves when the stock moves $1. Calls run 0 to 1, puts 0 to -1, so a 0.50 delta call gains about $50 a contract for each $1 the stock rises.
  • What is gamma in options?: Gamma is how much an option's delta changes when the stock moves $1. It peaks for at-the-money options near expiry, which is why short-dated options swing so hard.
  • What is theta (time decay)?: Theta is how much value an option loses each day as expiry nears, with the stock and volatility unchanged. Buyers pay it, sellers collect it, and only time value decays.
  • What is vega in options?: Vega is how much an option's price moves when implied volatility changes 1 point. A vega of 0.40 means $40 a contract per point, and it is largest for long-dated, at-the-money options.
  • What is implied volatility?: Implied volatility is the size of move the options market is pricing into a stock, as a yearly percentage backed out of option prices. Higher IV means pricier options, not a direction.
  • What is IV crush?: IV crush is the sharp drop in implied volatility right after a known event like earnings. Option prices fall with it, so a buyer can be right on direction and still lose money.
  • IV rank vs IV percentile: IV rank shows where today's implied volatility sits between its one-year low and high. IV percentile shows the share of days it was lower. One spike can skew rank, not percentile.
  • What is open interest?: Open interest is the number of option contracts still open: opened and not yet closed, exercised or expired. It comes from end-of-day clearing data, so it updates once a day, overnight.
  • What do ITM, ATM and OTM mean?: ITM, ATM and OTM describe where a strike sits against the stock price. A call is in the money when the stock is above the strike, a put when it is below; at the money means at the strike.
  • What is gamma exposure (GEX)?: Gamma exposure (GEX) estimates how much stock options dealers must buy or sell to stay hedged per 1% move. Positive GEX tends to calm moves, negative GEX tends to amplify them.
  • Positive vs negative gamma: what it means for the market: In positive gamma, dealers sell rallies and buy dips, so moves tend to shrink. In negative gamma, they buy rallies and sell dips, so moves tend to grow. Neither predicts direction.
  • What is the gamma flip level?: The gamma flip is the price where estimated dealer gamma turns from positive to negative. Above it, hedging tends to damp moves; below it, hedging tends to amplify them.
  • What are call walls and put walls?: A call wall is the strike with the most positive dealer gamma, often a ceiling; a put wall is the strike with the most negative, a level traders watch for support or a faster drop.
  • How is GEX calculated, and is it accurate?: GEX = gamma × open interest × 100 × price² × 1%, calls positive and puts negative, summed over strikes. It's a fair map of where hedging sits, not an exact dollar figure.
  • Does gamma exposure actually help you trade?: Somewhat. Research finds dealer gamma nudges volatility: positive tends to calm, negative to amplify. It doesn't predict direction, and news easily swamps it. Use it as a backdrop.
  • How market makers hedge options (delta hedging): Market makers delta hedge: after trading an option, they buy or sell enough stock to cancel its delta, then keep adjusting as price moves. They aim to earn the spread, not bet on direction.
  • What is a gamma squeeze?: A gamma squeeze is a rally fed by dealer hedging: heavy short-dated call buying forces dealers to buy stock, which lifts price and forces more buying. It's rarer than people claim.
  • What is max pain, and does it work?: Max pain is the strike where expiring options would pay holders the least. It's a weak guide: on October 30, 2026, SPY closed $7.88 below its $765 max pain; none of nine big names hit theirs.
  • What is the put/call ratio, and is a high one bullish or bearish?: The put/call ratio divides put activity by call activity. A high one looks bearish, but extremes are often read as contrarian, and it can't tell bought puts from sold ones.
  • What is OPEX, and why does monthly expiration move markets?: OPEX is options expiration day. Monthly OPEX is the third Friday (next: November 20, 2026). It can move markets because a large block of options, and the dealer hedges tied to them, expire at once.
  • What is the expected move, and how is it calculated?: The expected move is the ± range options price for a stock by an expiration, usually one standard deviation: price × implied volatility × √(days ÷ 365). SPY: ±$6.93 to November 2, 2026.

Using Tradytics

About Tradytics

  • What is Tradytics?: Tradytics is a web app for options and stock traders: live options flow, dark pool prints, dealer gamma, research, a 120-signal scanner, charts and an AI analyst in one place, with a Free plan.
  • How much does Tradytics cost?: Tradytics has three plans: Free ($0), Live ($39 a month or $299 a year) and Pro ($69 a month or $499 a year). No trial, no contract; cancel anytime and keep access to the end of the period.
  • What does the Tradytics free plan include?: The Tradytics Free plan is $0 with no card: every page and tool on yesterday's session, including options flow and dark pool prints, plus 3 AI analyst questions a day and portfolio tracking.
  • Is Tradytics legit?: Yes. Tradytics has run since 2020 on real OPRA options and FINRA dark pool data. Its old site drew billing complaints; the 2026 app has self-serve cancelling, no trial and a free plan.
  • Is Tradytics worth it?: Tradytics is worth it if you trade options or stocks and would otherwise pay for separate flow, dark pool, chart and scanner tools. Live is $39 a month; Free covers yesterday's session.
  • Where does Tradytics get its data, and is it real time?: Tradytics options flow comes from OPRA and is live to the second on Live and Pro. Dark pool prints come from FINRA reports and show within about 15 minutes of their report, so they are not real time.
  • How to cancel your Tradytics subscription: To cancel Tradytics, open the profile menu, choose Plan and billing, click Cancel plan and confirm. You keep your plan until the end of the period you paid for. No contract.
  • How many AI questions do you get on Tradytics?: The Tradytics AI analyst gives you 3 questions a day on Free, 20 a day on Live ($39 a month) and unlimited on Pro ($69 a month). Limits reset at midnight New York time.
  • Does Tradytics have a free trial?: No. Tradytics has no free trial; the Free plan is how you try it. Free is $0, needs no card and never expires: every page and tool on yesterday's session. The old $15 trial is gone.
  • Does Tradytics have a Discord?: Yes. The Tradytics Discord community costs $199 a month and includes a Pro plan. If you only want the data and the AI analyst, Pro alone is $69 a month and Live is $39.
  • How to upgrade, downgrade or change your Tradytics plan: Open the profile menu, choose Plan and billing, then Change plan. Changes start now and what's left of your period comes off the new price. To drop to Free, cancel and keep access to period end.
  • Who writes Tradytics Learn, and how we check it: Faizan Ahmad, the CTO of Tradytics, writes and checks every Learn and Compare page with the team, against Tradytics data and primary sources. Educational, not investment advice.