Building a trading decision system with Jev and Opus 5.5
A 12-step tutorial where Opus generates strategies and Jev turns market state into typed, probability-weighted choices that output ENTER/EXIT/HOLD/NO TRADE.
Jev + Opus 5.5 is the best AI trading system that I’ve built in my life It's actually replaces Quant teams at billion-dollar HEDGE FUNDS I just connected Opus 5.5 to Jev - Opus creates new strategies 24/7 while Jev scans the world’s best HFT playbooks, picks the perfect one and FIRES it in milliseconds setup takes literally 15 minutes: step 1 → Create your Jev and Claude API keys - these become the decision engine and research brain step 2 → Install the official Jev skill, connect the Anthropic SDK and store both keys securely in your environment step 3 → Connect a read-only market feed with historical prices, order-book state, indicators, fees and venue rules step 4 → Give Opus the full research mandate: instrument, horizon, market regime, execution limits and maximum acceptable risk step 5 → Opus develops the strategy thesis, entry logic, exits, invalidation rules and conditions under which the system must do nothing step 6 → Backtest every hypothesis and discard anything that collapses after fees, delay, slippage or out-of-sample validation step 7 → Convert the surviving playbook into typed Jev questions: regime, direction, setup quality, flow toxicity, risk and action step 8 → Build a causal state engine that compresses the live market into one small numeric snapshot-with no future-data leakage step 9 → Send the entire decision battery to Jev in one call whenever the market state materially changes step 10 → Map Jev’s probabilities and confidence into deterministic actions: ENTER, EXIT, HOLD or NO TRADE step 11 → Keep execution and risk in code: position limits, drawdown ceiling, daily loss limit, confirmation thresholds and kill switch step 12 → Let Opus review every fill, miss and rejected setup overnight - then propose the next strategy version for another backtest The architecture is simple: market data → Opus research → tested playbook → Jev decision → hard risk gate → execution The complete Jev + Opus 5.5 architecture is in the article below ↓
This post quotes another post: “Long read: how to build a Jev-powered agent stack”