Plain-English guides to technical indicators, settings, chart behavior, and practical trading rules for trend following and breakout strategies.

Flat Base Pattern: How a Shallow Consolidation Forms

A growth stock has climbed from 42.00 to 68.50 in fourteen weeks, and then it stalls. For the next seven weeks the weekly bars drift sideways. Price never trades above…

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Fundamental Law of Active Management: Skill and Breadth

Two research decks land in the same week. The first belongs to a manager who called four big macro turns over three years and got every one of them right.…

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Prediction Intervals: Reading Forecast Uncertainty

The band around the forecast is a claim you can test A forecasting model hands you two things at once. There's the number everyone reads, say a projected close of…

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Strategy Capacity: When Trade Size Changes the Result

A backtest can look flawless and still be untradeable. I've watched rules with clean equity curves that assumed every signal filled at the closing print fall apart the moment real…

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Rank Correlation: Measuring Screen Ranking Stability

You run a factor screen at the end of August, and the ten names at the top look familiar. You run it again four weeks later. The same companies are…

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Heteroskedasticity: Why Model Errors Change Size in Markets

A backtest hands you a clean-looking number. The strategy's average edge is 0.4% a week, the confidence interval sits comfortably away from zero, and the significance test says a result…

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Maximum Drawdown: Reading a Peak-to-Trough Decline

Two accounts finish the year at the same value, built from the same set of returns. One you could have held without much stress. The other spent months trading below…

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Market Fragmentation: How One Stock Trades Across Venues

Pull up two market data feeds on the same stock at the same second and you'll often see them disagree. One shows 1,200 shares offered at 48.75. The other shows…

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Investable Universe: The List Behind Every Stock Screen

Two traders run what they call the same momentum screen on Monday morning. Both rank US equities by six-month price change, both take the top twenty, and both trust the…

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Cross-Impact in Trading: How One Order Moves Another

An index future ticks higher on a burst of buying. A beat later, the best offer on one of its larger constituents lifts by a couple of cents, and the…

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