Apex · Trading engineAlgorithmic trading with an audit chain.Apex composes strategies, risk gates, and broker integrations into a multi-tenant engine. Every signal, every gate verdict, every order links back through Cortex’s provenance graph. The dashboard is hosted; the engine runs on your hardware. Your keys, your trades, your audit chain.

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cargo add apex-core

Built so you can prove every trade.The same audit substrate that Cortex gives the rest of the stack runs through every Apex decision. Production trading and historical backtest share one provenance chain.

Audit by constructionEvery strategy decision, gate verdict, and broker submission records a Cortex provenance node. Walk the chain back from any order to the inputs that fed it — sentiment scores, market bars, prior agent steps. No after-the-fact reconstruction.

Strategies ship with a behavioral canaryEach strategy’s signal output on a known bar series is frozen in a committed JSON snapshot. Any change to strategy logic that shifts the output fails the build until you revert or explicitly regenerate. Refactor with a regression net.

Multi-tenant from day oneEvery Signal, Order, Position, and provenance node carries a TenantId. One engine serves many end-users without state crossover. Build a fund, an alpha platform, or a single-user CLI on the same substrate.

Pluggable brokersAlpaca first — REST integration verified on the wire against paper-trading round-trips. The Broker trait is four methods (submit, cancel, list-open, list-positions); swapping brokers is a constructor swap. IBKR, Schwab, Robinhood ports queued.

Backtest that matches realityWalk-forward windows for overfit detection, information coefficient for signal-quality measurement, slippage models (next-bar-open fills with bps drag). The same Cortex chain runs in backtest — if your test passes, you can replay it node by node.

Hybrid by designThe dashboard, auth, and audit viewer run on Fusion. The engine and the broker credentials run on hardware you control. A signed WebSocket relays state and commands between them. We see the summary; you keep the keys, the chain, and execution authority.

Pricing during alpha.Free across the board while we’re in alpha. Tiers + hosted-tier pricing land alongside the public launch.

ENGINEFreeOpen source. Run on your own hardware via the published Docker image or build from source. Use forever, no Fusion account required.

CLOUD CONTROL PLANEFree^†Dashboard, auth, audit viewer, kill-switch UI at cloud.apex.fusion.dev.† In alpha. Paid tiers post-launch; pricing TBD, anchored on what the hosted side actually costs to run.

INTEGRATOR / B2BTalk to usEmbedding Apex in your product, running the engine in your own infra at scale, or both. Pricing is custom while we’re still learning the integrator shape.