Screenline: A stock screener that keeps receipts

Why it surfaced

Screenline archives rankings using only the data available at the time, making its track record auditable rather than hindsight-selected. Its central idea is equally clear: a 4% move means different things for different stocks, so every move gets measured against its own volatility.

A rules-based market screener that ranks stocks and explains daily moves against each stock’s own volatility.