Market Chameleon vs OptionStrat vs ORATS vs Unusual Whales

Disclosure: TickerRisk publishes this page and is included in the comparison. The other four are larger, older and better at most things listed here, and the page says so. Features were checked against each tool’s public pages in October 2026; plans and prices change, so confirm on the vendor’s own site before you subscribe.

The short answer

• Researching earnings and implied volatility: Market Chameleon.
• Modelling a specific trade (profit/loss at a price and date): OptionStrat.
• Quantitative volatility data, earnings implied versus historical moves, backtests: ORATS.
• Following large and unusual options trades: Unusual Whales.
• Checking whether earnings, an FDA decision, a court event or an SEC event falls before your expiry, across many stocks at once: TickerRisk.

A common setup for people who sell premium is one research tool (often Market Chameleon or ORATS), one modelling tool (OptionStrat or the broker’s own), and a calendar check before every trade.

Feature matrix

“Yes” means it is a core, documented feature. “Partial” means it exists but is narrow or premium-only. “—” means we did not find it as a feature, which is not the same as proof it is absent.

Market Chameleon

The broadest research site of the group. Its strengths are earnings (calendars, how a stock has moved around past reports, implied-move charts) and volatility (IV rankings, unusual option volume, screeners). It also has a biotech catalyst page and PDUFA dates, which makes it the first stop for anyone trading drug stocks into FDA decisions.

Where it falls short: the depth sits behind a subscription, the site is dense, and events live on separate pages rather than being combined into a single “is this safe over my expiry” answer.

Use it if: you research earnings trades or volatility and want the most complete free-to-paid site in one place.

OptionStrat

The best-known tool for modelling a trade. Build any strategy, see the profit/loss curve at different prices and dates, and let the optimizer suggest strategies for a target price and expiry. Its paid tiers add real-time unusual options flow.

Where it falls short: it answers “what happens to this trade if the stock moves” rather than “is something scheduled that will move it”. You bring the event research yourself.

Use it if: you want to see exactly how a spread, condor or calendar behaves before placing it.

ORATS

The most quantitative of the group, built on a long history of options data. Its daily Earnings Move report compares the move options are pricing with how much the stock has actually moved after past reports, and it offers backtesting and strategy tools on top of that data.

Where it falls short: it is made for traders who are comfortable with volatility data and pay for it; there is little here for non-earnings events like court rulings or FDA decisions.

Use it if: you trade earnings volatility systematically or want to backtest premium-selling rules.

Unusual Whales

An options-flow platform first: it surfaces large and unusual trades, sweeps and dark-pool prints, plus congressional and insider trading. It also carries earnings, economic and FDA calendars. The free tier works with delayed data; real-time flow is paid.

Where it falls short: flow tells you what other traders are betting on, not what is scheduled. Reviewers generally describe it as less suited to beginners or to analysis beyond flow.

Use it if: following big money is part of how you pick trades.

TickerRisk

Ours, so read this with appropriate suspicion. It does one job: for a given stock and a given expiry, it checks whether anything is scheduled to happen before the option expires, across five event types — earnings, FDA decisions, legal filings, SEC events and clinical milestones — and condenses that into a 0–100 score (70+ HIGH, 45–69 MEDIUM, under 45 LOW).

The score is specific to the expiry you pick. One week and four weeks can give very different answers for the same stock, because an earnings report in week three only matters if your option is still open then. The scanner applies this across the S&P 500, and the wheel and covered call scanners filter candidates on it by default.

Where it falls short, plainly: no options flow, no profit/loss modelling, no backtesting. Premiums come from a delayed feed and are estimated where no bid exists (flagged in the table), so confirm in your broker. Coverage is the S&P 500 plus common ETFs, not every optionable stock. The score measures scheduled event exposure, not which direction the stock will move.

Use it if: your recurring mistake is selling an option into an event you did not know about.

Which to choose

• “Is the market pricing a big earnings move, and is that more than usual?” ORATS or Market Chameleon.
• “What does this trade make or lose if the stock goes to X by Friday?” OptionStrat.
• “Who is buying calls in size today?” Unusual Whales.
• “Of these twenty stocks, which have nothing scheduled before my expiry?” TickerRisk.

Whatever you use, the check that prevents the worst losses for option sellers is the same: before opening a position, confirm what is scheduled between today and expiration. See how to check catalyst risk before selling options for the free primary sources behind each event type.