What free screeners do well — and where they stop
Free unusual-activity tables answer 'what traded a lot today.' They rarely answer 'which of these is worth my review time.' ConvexRadar's ranking and catalyst context exist for that second question.
Free screeners like Barchart's are a common starting point. ConvexRadar is built for the next step: a ranked, contract-level scanner that combines unusual-activity pressure with IV cost, catalysts, and saved-contract tracking in one paid but inexpensive workflow.
Free unusual-activity tables answer 'what traded a lot today.' They rarely answer 'which of these is worth my review time.' ConvexRadar's ranking and catalyst context exist for that second question.
Screener users typically bounce between a volume table, an IV page, an earnings calendar, and a watchlist. ConvexRadar folds those into one row per contract, then lets you save and track what you found.
ConvexRadar is not affiliated with Barchart. And like every page on this site: options flow is one research input, ConvexRadar's print typing is a chain-derived proxy rather than licensed full-tape data, and nothing here is financial advice.
| Feature | ConvexRadar | Barchart |
|---|---|---|
| Entry price | Free tier; Founder $29/mo, Pro $49/mo | Premier $29.95/mo after a 30-day trial (Plus $9.99/mo has no options flow) |
| Free tier | Yes | Yes |
| Options data source | No licensed tape. Print typing is derived from option-chain behaviour and labelled as a proxy in the UI. | Consolidated all-exchange coverage, delayed roughly 25-30 minutes |
| Congressional disclosures | Yes — Senate EFD disclosures, pinned to price history | Yes — politician trading page, updated twice daily |
| Published record of its own signals | Yes — public page grading the scanner's own past rankings; first graded results from August 2026 | Backtested Win% on equity signals; none published for options flow |
| Product focus | Contract-level ranking with catalyst context | Broad market-data site with options screeners in Premier |
Barchart Premier is the like-for-like tier; the $9.99 Plus tier contains no options-flow tooling. Their options pages state data is delayed approximately 25 to 30 minutes. Published Win% covers backtested equity signals, not options flow. Figures are taken from the vendor’s own public pages and can change without notice — check the current source before deciding. We are not affiliated with Barchart; product names are their owners’ trademarks.
No. ConvexRadar is independent, and this page is a comparison for traders considering a paid step up from free screeners.
Free tables show raw volume. ConvexRadar ranks exact contracts, adds IV cost and catalyst context, and tracks saved contracts — the parts of the workflow that take the most manual time.
Founder Beta is $29/month and Pro is $49/month, each with a 5-day free trial, so the workflow can be tested before paying.
Trading options involves risk. ConvexRadar is research software and does not provide financial advice or guarantee trade outcomes.