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Dave Johnson – Quantitative Trading System Developer

I'm a former investment advisor who spent years managing tens of millions in client portfolios. Before that I was a broker. I have been studying markets, building systems, and trading mechanically for over 30 years.
These days I do not manage client money. I build rules-based trading systems, backtest them honestly, and share the research publicly through this site and my Substack publication.
In my own portfolio I run more than two dozen mechanical systems spanning micro to weekly timeframes, all executing automatically every day. That is not a marketing claim. It is just what my trading life looks like at this point in my career.
The systems I publish here, Bear Hunter and the Elite SPY Trading System, represent the best of that work made available to other traders. Every entry, exit, and filter is defined in advance and tested against decades of real market data. Nothing is hidden behind vague claims or black box logic.
I started Trading Time Machine because I genuinely believe that rules-based, backtested approaches are the most honest way to trade. Not because they are perfect but because they remove emotion from the equation and give you something you can actually evaluate and trust over time.
The research and tools on this site are mostly free. The flagship systems are not. The difference is real and I am transparent about it.
I am currently based in Connecticut and relocating to Italy in mid 2026.
You can reach me at [email protected]
X/twitter: @thetrading
​​Facebook: Trading Time Machine

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