Trading Time Machine
Dave JohnsonMechanical trading systems. Honest backtests. No hype.
| Platform |  | Pricing | Only free issues | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 137 | Founded | 6 years ago | Last Issue | 7 days ago |
| Active | |||||
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backtest.substack.comLatest Issues
The 9/21 EMA Strategy Lost to Random Stocks 20 Times Out of 20
Research and education: the 9/21 EMA rules tested on every Russell 1000 stock since 1999, including stocks later removed from the index
The 9/21 EMA strategy is a familiar setup on trading sites and social media. It uses two exponential mo...
Help me and you get the deal on Bear Hunter
Bear Hunter is one of the most searched and popular pages on the website. I recently designed an app that puts all the signals and systems in one web application. The app also sends the nightly signal emails.
The next piece was automating...
Only 2000 Was This Lopsided: S&P 500 Down 2.4%, Typical Stock Up 4%
Weekend market note, data through Friday, October 23, 2026
On Thursday the Nasdaq Composite fell 2.6%, its biggest one-day drop since June 5, and the S&P 500 lost 1.2%. Yet 337 of the 503 stocks in the S&P 500 went up that day, and the med...
Opening Range Breakout on QQQ: 19 Years, One Filter
QQQ lost 32.6% in 2022. A rule that bought QQQ on the breakout above its first 5-minute high, only on mornings when the recommended exposure reading was 70 or higher, and sold at the 4:00 close, made 12.1%.
Since 2007 the rule has returned...
The S&P 500 Fell 1.9% This Week, but 70% of Its Stocks Rose. Here Is What Happened and How Rare It Is.
The S&P 500 lost 1.9% this week and closed Friday at 7,659, which is 2.0% below the record it set on October 6. Yet 352 of its 502 stocks went up. The typical stock gained 2.6%.
Of the 355 weeks since 1990 in which the S&P 500 fell by 1.5%...
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The writers behind this newsletter.
Former investment advisor. Mechanical trading system developer. I build rules-based systems and share the research behind them at TradingTimeMachine.com.
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