What MADDOG is
MADDOG is a $99.90-a-month AI trading assistant that turns ChatGPT Work or Claude Cowork into an Al Brooks-style price-action analyst. Ninety minutes after a market opens, MADDOG reads the session so far and returns five probabilities for how the full day could finish — trend up, reversal, trending range, range, trend down — each with a confidence grade, plus the window’s first range breakout carried with pre-registered outcome rates. It is educational analytics, not investment advice, and it never returns a trade instruction.
Last updated 2026-08-18
Who is MADDOG for?
MADDOG is for day traders and swing traders who already read price action and want the base rates behind what they are seeing. It suits people who work with an AI assistant daily and would rather ask a question in ChatGPT or Claude than open another dashboard. It is not a signal service, and it will not tell anyone what to buy.
How does MADDOG work?
MADDOG is a private prompt plus an API. Members paste the prompt into ChatGPT Work or Claude Cowork, and from then on their own AI can pull a MADDOG read on any covered ticker — 50,000 calls a month per seat. Standard ChatGPT or Claude chat on web and mobile cannot attach the required API-key header; the Work and Cowork modes can, which is why MADDOG runs there.
Underneath, the Al Brooks price-action framework was mapped from 9,027 chart slides into a structured label system, and a Transformer was then trained on 16 years of ES (S&P 500 futures) five-minute session data.
How accurate is MADDOG?
MADDOG calls the correct day type first, out of five, 66% of the time over a complete US day session — against a 37% majority-class baseline. Accuracy is not flat across sessions, which is why every read ships with a confidence grade: when the model’s own conviction and the agreement of the most similar past sessions were both high, the top call was right 95% of the time; when both were low, 41%. The breakout estimates were validated zero-shot on NQ data from 2023 onward: AUC 0.646, calibration error 5.1%, n = 2,637.
The published statistics are pre-registered — each claim and its exact definition were fixed before being scored — and the misses are published next to the hits. The opening-range article shows the method in full.
What markets does MADDOG cover?
MADDOG covers US stocks and ETFs, Hong Kong stocks, China A-shares, futures, FX pairs, crypto, and tokenised gold. Symbol formats and the exact per-market rules are in the API reference; the one that trips people up is Hong Kong, where codes are four digits and zero-padded (0700.HK, not 700.HK).
What does MADDOG cost?
MADDOG costs $99.90 a month for a founding membership, which includes both delivery channels: 50,000 API calls a month from the member’s own AI, and a daily email desk covering up to 10 named tickers, delivered 90 minutes after each market’s open every trading day. There is no free API key and no trial, but anyone can get one full read free by leaving an email and a ticker on the homepage — no account, no card, nothing recurring.
What MADDOG is not
MADDOG is not investment advice, not a forecast service, and not a signal provider — it reports how sessions that looked like this one have resolved historically, and stops there. MADDOG is independent research and is not affiliated with or endorsed by Al Brooks.
MADDOG at maddog.finance is also unrelated to similarly named ventures: it is not the Mad Dog Finance crypto token, not MadDog Ventures the investment firm, and not maddogmoney.com. The only MADDOG described here is the price-action analytics service at maddog.finance.
Who makes MADDOG?
MADDOG is built and run by an independent quantitative research team that publishes its measurements, including the ones that came in below the framework’s traditional claims. Questions go to info@maddog.finance.