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Cornerstone guides

New here? Skip the chronological feed — these are the best starting points, grouped by what you trade and how you test it.

Category: Showing 28 posts
★ Latest Trading Systems Jun 23, 2026 4 min read
Why Fundamental Analysis Is So Hard

No one can fully model an economy — the lesson of “I, Pencil.” Why fundamental analysis is harder than it looks, and what a…

Trading Systems Jun 18, 2026 3 min
The Mental Traps That Cost Traders the Most
Dunning-Kruger, Sherlock-style storytelling, your buddy’s hot chart — most trading losses come from predictable mental traps and bad sources, not the market.
Trading Systems Jun 16, 2026 4 min
Will AI Beat the Market?
AGI, ChatGPT, a clever algorithm — will AI finally "solve" the markets? Why the market is not a static puzzle, and what actually still…
Trading Systems Jun 11, 2026 4 min
Do Candlestick Charts Work for Swing Trading?
Candlesticks have great names and devoted fans — but do the patterns predict anything once you define them as rules and test them with…
Trading Systems Jun 9, 2026 3 min
How to Build a Simple Trend-Following System
Trend-following is one of the oldest edges in markets. How to define a trend mechanically, trade with it, and manage risk — the framework,…
Trading Systems Jun 4, 2026 3 min
How Traders Blow Up — and Why Systems Survive the Craters
The yen-carry algo, Credit Suisse, every bubble and flash crash share one pattern. Why blow-ups rhyme — and how rules-based risk control survives them.
Trading Systems Jun 2, 2026 4 min
Trading Psychology vs. Edge: Why Following the System Is the Hard Part
A tested edge is worthless if fear talks you out of the trades. Why trading psychology — not prediction — is the real bottleneck,…
Trading Systems May 28, 2026 4 min
SPY Swing Trading: Trend-Following Meets Mean Reversion
A rules-based SPY swing strategy: a trend filter sets direction, mean reversion times long and short entries. Fully disclosed EasyLanguage code.
Trading Systems May 26, 2026 4 min
E-mini (ES) Swing Trading: The Futures Version of My S&P System
Trend-plus-mean-reversion swing trading for E-mini S&P 500 futures — long and short, volatility-sized, with @ME micro support. EasyLanguage code.
Trading Systems Mar 18, 2024 8 min
SPY Swing Trading Strategy: 82% Winners Using 3 Lines of Code
It’s time to stop treating your spy swing trading as a hobby, it’s time to get serious. Understanding the exact odds of every trade…
Investing And Trading Mar 18, 2024 7 min
The QQQ Trading Strategy That Works Great
Here’s a new QQQ swing trading strategy if you want to swing trade the NASDAQ instead of the S&P 500. In another post, I…
Trading Systems Mar 18, 2024 5 min
Day Trade Gold With 3 Easy Lines of Code
Day trading gold is usually a fool’s errand, but these exact, repeatable rules uncovered a weekend anomaly that has back-tested profitably for years. With…
Trading Systems Mar 17, 2024 4 min
How To Short SPY With This Opening Range Breakout Strategy
If you follow this opening range breakout strategy you can easily sell short the SPY ETF for a day trade. These patterns also work…
Investing And Trading Mar 17, 2024 6 min
Original Turtle Trading Rules – Do They Still Work?
​Do the original turtle trading rules still work in the modern trading world? They certainly did in the 1980s! In fact, the rules made millionaires out…
Trading Systems Mar 16, 2024 4 min
An Opening Range Breakout Strategy for Day Trading Gold
I’m going to lay out, in all its glory, a very simple Gold opening range breakout day trading system that I coded years ago.…
Trading Systems Mar 15, 2024 5 min
The RSI Trading Strategy That’s Been Working Since 1960
95% of traders don’t have a plan when it comes to trading, they are flying utterly blind. They don’t know, statistically, if what they…
Investing And Trading Dec 23, 2021 4 min
The VIX Trading Strategy Made Simple
Did you know that you can make your own VIX trading strategy using just price? The VIX is often called the “Fear Index” and…
Trading Systems Dec 19, 2021 4 min
The MACD Trading Strategy Only Works Flipped On Its Head
Do you use the MACD trading strategy? Well, I’ve tested it, and the results are going to shock you – it doesn’t work at…
Trading Systems Nov 28, 2021 5 min
Flash Crash Trading Strategy With 81% Winners
Seems like flash crashes are happening more and more regularly. Let’s first look at why flash crashes happen. Then let’s build a super simple…
Trading Systems Oct 22, 2021 5 min
How to Backtest a Trading Strategy Like a Fool
I woke up this morning and grabbed a cup of coffee, then just for fun, I decided to type “how to back-test” into YouTube.…
Investing And Trading Apr 6, 2021 6 min
Is ETF Sector Rotation The Key To Riches?
To understand ETF Sector Rotation trading imagine you were able to keep betting on the leading horse as it went around the race track.…
Investing And Trading Mar 18, 2021 6 min
Out-of-Sample Testing Makes or Breaks Trading Strategies
I’ve seen thousands of good-looking trading strategies turn into a big, steaming pile of horse manure when traded in the real world. How can…
Investing And Trading Jan 29, 2021 2 min
Reddit Day Trading Is a Great Way to Lose All Your Money
If I had to make a guess, I’d say most of the people on Reddit day trading are “News Traders” (the worst type you…
Investing And Trading Jan 14, 2021 4 min
No, Technical Analysis Does NOT Work
Technical Analysis officially died on April 21st, 1982, the day stock index futures first appeared on the Chicago Mercantile Exchange. Ever since, the stock…
Investing And Trading Dec 16, 2020 3 min
Automated Fibonacci Trading Strategies Do Not Work
I tried to make an automated Fibonacci trading strategy once, and it didn’t work. I discovered that Fibonacci retracement levels are akin to Santa Claus, the…
Investing And Trading Sep 15, 2020 4 min
Pareidolia Will Doom Your Trading Account
If you don’t know what pareidolia is, don’t be hard on yourself, because it’s likely that your spell checker doesn’t know either. Basically, pareidolia…
Investing And Trading Jul 25, 2020 12 min
Trading 101 | The Fundamentals
The vast majority of traders and investors basically don’t have much of a plan. And most believe that all they have to do is…
Investing And Trading Mar 30, 2020 3 min
Stock Position Size Calculator For Pro Traders
If you have any money in the stock market you MUST know this one position size calculator for stocks equation.   In my experience…
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