// writing

Blog

Filtered by:alertingclear ×

2026-07-17pythonmonitoringalertingtrading-botstatisticssignal-noise

Killing Alert Noise with Sigma

My bot watches a list of instruments during the day and pings my phone when something moves. The first version had the obvious rule: alert when any instrument moves more than a flat 3% from yesterday's close.

Giving the Lab a Pager

In the previous post, a server died and stayed dead for five weeks before I noticed. The autopsy taught me the lesson every ops book repeats and every homelab ignores: a system nobody watches fails in silence.