// Blog
Blog Posts
Product updates, technical write-ups and lessons from building software: how each app works, the decisions behind it, and what was learned along the way.
Nyao Straddle: a gold EA that only trades extreme volatility
My second open source MetaTrader 5 EA waits for gold's most extreme hours, then trades $1 breakouts in both directions. How it works, the crash that made most of its profit, a coin flip test, and why it only works on gold.
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Nyao Scalper: an open source gold EA that trades with the trend
My MetaTrader 5 Expert Advisor for gold: how it decides when to trade and when to exit, what the backtests say, including the losing years, and the many ideas that didn't make it.
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Godwit: CSV migration without sending your data to an AI
An open source tool that maps an old system's CSV export to a new system's import format from two samples, fully offline. Why I took the LLM out of it, and how it works now.
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Zirel POS: one app for the counter and the back office
A point of sale app for checkout, orders, inventory, customers, staff and reports, for one location or many. Why I built it, how the first version was done in about a month with AI-assisted development, and the main features.
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Flutter POS: an offline-first app that started as a technical test
My open source Flutter POS began as a technical test for a job. How offline-first apps are usually built, which of those methods Flutter POS uses, how its sync works, and the bugs people found after I published it.
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Money Chat AI: a finance chat where the AI only writes commands
My open source finance tracker that you just chat with. How a habit of recording receipts led to it, why the model only replies with slash commands, and how that idea turned out to be close to MCP.
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