# Radon Terminal > A market-structure research terminal that scores institutional accumulation and distribution from dark-pool and OTC prints before the lit price moves, then routes only defined-risk options structures that clear four sequential gates. Radon is built for options traders, flow traders, GEX and gamma traders, day traders, swing traders, and retail and professional investors who want positioning models paired with an execution discipline rather than a levels dashboard. Live trading requires an Interactive Brokers account; Radon is a research instrument, not a broker. Robinhood is not integrated, but anyone can explore the free demo. Data sources: Interactive Brokers (realtime tape, account, order routing) and Unusual Whales (dark-pool prints, options flow). MenthorQ levels are consumed as a data source for CTA and levels tools. SpotGamma is a comparable gamma-analytics service, not a data source. ## Product - [Radon Terminal](https://radon.run): the method, models, and discipline, argued section by section - [Free demo](https://demo.radon.run): full demo instance with seeded data, no brokerage connection required ## Method - Flow scoring: off-exchange and OTC prints are venue-weighted, normalized to a rolling z-score, and read for directional pressure from print-side and size clustering, producing a flow score with a measured lead window per ticker - Regime models: CRI (Crash Risk Index, tail risk), GEX (dealer gamma exposure with walls and magnets), VCG-R (volatility-credit gap, panic detection), GRG (gamma rotation gap, sector rotation) - Discipline: four sequential gates (convexity of at least 2x loss, a named data-backed edge, fractional Kelly sizing hard-capped at 2.5% of bankroll per position, defined risk), then seven milestones from candidate to routed Interactive Brokers combo order - Record: every trade journaled with its full decision chain and lot-matched P&L ## Dossiers - [Interactive Brokers dark pool terminal](https://radon.run/interactive-brokers-dark-pool-terminal): the terminal on Interactive Brokers rails: off-exchange prints scored for accumulation, then routed as defined-risk IB combo orders - [Defined-risk options structure catalog](https://radon.run/defined-risk-options-structures): the full structure catalog with legs, bias, max gain, max loss, and a defined or undefined risk verdict for each entry - [Fractional Kelly position sizing](https://radon.run/fractional-kelly-position-sizing): how positions are sized: fractional Kelly from structure max loss and signal odds, hard-capped at 2.5% of bankroll per position - [Unusual Whales + Interactive Brokers](https://radon.run/unusual-whales-interactive-brokers): how Unusual Whales flow becomes Interactive Brokers orders: prints scored, gated, sized, and routed as defined-risk combo orders - [Convex options from dark pool flow](https://radon.run/convex-options-from-dark-pool-flow): the seven-milestone method that turns a dark pool print into a convex, defined-risk options trade, with thresholds and stop rules - [Crash Risk Index](https://radon.run/crash-risk-index): CRI, the tail-risk regime model: VIX, VVIX, COR1M implied correlation, and SPX distance from its 100-day average, each scored 0 to 25 and summed into a published 0 to 100 regime read ## Optional - [GitHub](https://github.com/joemccann/radon): source repository