RSI looks simple on paper. It’s a 0-100 momentum oscillator. Everyone knows what it looks like on a chart. Most developers assume implementing it is an afternoon’s work. It took me longer than I expected. Not because the math is hard, but because there are three places where a naive implementation produces wrong answers, and… Continue reading
Last Friday at 8pm London time, Anthropic blocked subscription-based access for third-party agents. If you were using Claude through Cursor, Cody, OpenClaw, or anything other than Claude Code or claude.ai itself, your token stopped working. I was one of those users. I run an AI assistant (OpenClaw) that augments my work: code review, calendar management,… Continue reading
Richard Donchian’s channels are among the oldest systematic trading tools. The Turtle Traders used them in the 1980s. The rules were simple: buy when price breaks above the 20-bar high, sell when it breaks below the 20-bar low. The math is equally simple: Three lines. No smoothing, no ratios, no weighting. Just the extremes and… Continue reading
Every indicator in quantedge-ta before the Stochastic Oscillator shares a design pattern: each new bar’s contribution decays over time. SMA: uniform average, old bars age out as the window slides. EMA: exponential weight, old contributions shrink but never hit zero. RSI: Wilder’s smoothing, same story. MACD: two EMAs composing. ATR: Wilder’s smoothing on True Range. None of… Continue reading
Some bugs are hard because they’re complex. Some are hard because they’re intermittent. The worst ones are both. This one took three months. Forty-eight builds. An iOS crash that appeared under conditions that resisted every attempt to reproduce it reliably. If you read the first post, you know the setup: a third-party Flutter-backed ticketing SDK embedded… Continue reading