Recent posts:

• 09 Sep 2026 Candlestick Tasseography

  Modern technical analysis has roots in Charles Dow's studies of market trends at the turn of the twentieth century. Since then, chart reading has expanded into a large collection of numerical indicators built from prices and trading volume. Their appeal is understandable: markets aggregate news, expectations, and trading decisions into a price history, and indicators offer a compact way to describe its trends, momentum, and volatility. Traders use these descriptions to inform timing, execution, and risk decisions. But the leap from describing yesterday's pattern to predicting tomorrow's return makes the subject controversial, as the apparent regularities often end up being stories fitted to noise. That tension makes the tools worth understanding. In this fun little article we'll examine a few widely used indicators, explain their arithmetic, and connect them to the trading mechanisms behind price movements.

  
  
• 24 Aug 2026 Virtualization and Deployment

  A desirable thing in computer science is to decouple the program from its execution environment. Yet, a full abstraction of the low-level execution is likely impossible, so in practice the goal is more modest: to build deployment systems that provide consistent and predictable execution environments across different and potentially failing hardware machines. In concrete terms, the program needs CPU time, memory while it is executing, files and network connections, compatible libraries and configuration, and somewhere durable for the data that must outlive it. None of these is unlimited or inherently private. So how do we achieve reliable provisioning of these resources? Let's "re-derive" the current solution from the ground-up.

  
  
• 30 Jul 2026 The Fundamental Theorem of Asset Pricing

  What makes an uncertain promise worth something today? Is a price a forecast of the future, a measure of collective optimism, or an expression of how much we fear bad outcomes? Financial markets seem to bundle all of these forces into a single number. In that context the fundamental theorem of asset pricing is one of those deep theoretical results with enormous practical significance. It shows that, beneath that complexity, prices must obey a remarkably simple logic: consistent prices leave no room for a free lunch.

  
  
• 21 Jul 2026 Grep and the Theory of Pattern Matching

  grep is one of those small programs that expose a large idea. It can find symbols in codebases, locate failed requests in a log, filter pipelines, or test whether a configuration setting exists. The central problem is simple enough: we are given some text, and a description of what we want to find. grep is what solves this line by line. The newline is its default record separator, so the program can work incrementally: read a record, decide whether to emit or discard it based on the description, and continue. This small design choice is why it fits the Unix pipeline so well. Underneath, it hides interesting connections to formal languages, finite automata, compiler construction, and careful algorithm design. Let's explore.

  
  
• 02 May 2026 The Wild Atlantic Way

  This is the rightful conclusion to an epic trilogy of mighty roadtrips, full of vast green plains and breath-taking steep seaside cliffs. We previously did Scotland's NC500, then Iceland's Ring Road. Now it's time for Ireland's Wild Atlantic Way.