Trading bot uses Jev to make six judgments within each 300ms block
Arguing that LLM thinking is too slow for the order book, the author uses Jev to answer six questions per block at once, including regime, toxic flow, and direction, at a running cost of $10–25 all day.
Every AI trading bot you've seen is answering questions about a market that no longer exists. An LLM takes 3–30 seconds to think about an order book. The book moves 40 times in that window. By the time the model answers, the market it was answering about is gone. that's why nobody could run a real AI trader 24/7. Jev answers inside a single 300ms block. 6 questions at once: regime, toxic flow, direction, liquidity, quote quality, inventory pressure. Running it every block, all day, all month: $10–25. The same loop on a frontier LLM: $50–150 per hour. for the first time, retail can run the brain of a market maker for less than a Netflix subscription.
This post quotes another post: “Building an HFT trading bot with Jev: one buy/sell decision per block”