About The Williams Radar
The Williams Radar is built and maintained by Federico Moctezuma, a Mexico City-based trader and technologist with 20+ years of market experience.
About The Williams Radar
The Williams Radar is published by a group of traders and technologists with more than 50 years of accumulated market experience. We are long-time students of Bill Williams' work, and the radar is our attempt to put that work into a tested, transparent, weekly trading system for the patient investor.
Every Friday after US market close, an automated scanner runs across 255 US-listed equities spanning 13 sector ETFs and detects confirmed Williams AO/AC momentum signals. The results are published here, raw and unfiltered.
No recommendations. No price targets. No proprietary black box. Just signals, on a fixed cadence, with the record kept publicly so time can be the judge.
Mission
We are building this for one kind of investor: the patient one — the investor who understands that real, durable wealth is built over years, not over a quarter, and that the market rewards discipline more than intelligence and honesty more than confidence.
Our job is to extend their Wealthspan — not by telling them what to buy, but by giving them a model that looks at the same data every week, applies the same rules every week, and publishes the results every week, before the move, not after.
If a signal fails, we say so. If the model is wrong, we say so. If the market does something the model didn't see coming, we say so. The record is the product.
The Method
The scanner implements the Williams Awesome Oscillator (AO) and Accelerator Oscillator (AC) as described in Bill Williams' Trading Chaos (1995) and New Trading Dimensions (1998). These two oscillators measure market momentum at two timeframes simultaneously — the AO captures the broader momentum wave, and the AC captures its acceleration or deceleration.
When both align in the same direction, Bill Williams considered this a high-probability setup worth watching.
The full technical specification, including formulas and signal classification, is on the Methodology page.
The Universe
255 US-listed equities, drawn from the constituents of 13 sector ETFs covering the major segments of the US market:
| Sector | ETF | Family |
|---|---|---|
| Utilities | XLU | SPDR |
| Industrials | XLI | SPDR |
| Consumer Discretionary | XLY | SPDR |
| Health Care | XLV | SPDR |
| Real Estate | XLRE | SPDR |
| Technology | XLK | SPDR |
| Financials | XLF | SPDR |
| Communication Services | XLC | SPDR |
| Materials | XLB | SPDR |
| Biotech | IBB | iShares |
| Consumer Staples | XLP | SPDR |
| Biotech | XBI | SPDR |
| Energy | XLE | SPDR |
The universe is reviewed and updated quarterly.
Why Weekly?
The AO/AC methodology is designed for swing trading timeframes — holding periods of weeks rather than minutes or months. A weekly cadence captures the signal setup window before momentum either confirms or fades. Daily noise generates too many false entries; monthly cadence misses the move entirely.
Weekly is the natural frequency of this edge.
Disclaimer
The Williams Radar is published for educational and informational purposes only. Nothing on this site constitutes financial advice, investment recommendations, or a solicitation to buy or sell any security. Past signal performance does not guarantee future results.
All signal data is derived from publicly available market data. Always consult a qualified financial advisor before making investment decisions. Members of the team may or may not hold positions in any securities mentioned.
For questions or feedback, reach out via X/Twitter @fedemoctezuma.