Every stock chart now carries a relative strength line — the classic one from the growth-stock playbook. It is simply the stock's price divided by the ASX 200 on the same day, drawn as a thin line beneath the candles. When the line rises, the stock is beating the market; when it falls, it's lagging. What the price itself is doing doesn't matter: a stock can be sideways while its RS line climbs, and that is often the more interesting fact.

Watch the dots. A blue dot marks each day the RS line reaches a new 52-week high. A larger, darker dot marks the case leaders are known for — the RS line has broken out to a new high while the price has not yet made one. Historically, the price tends to follow. The dots need a year of history behind them, and that year is loaded ahead of the chart, so a chart that opens two years back gets them from its first bar.

This is a different thing from the RS rating the site is named after. The rating ranks a stock's twelve-month relative performance against every other stock on the ASX, from 1 to 99, once a night. The line is the raw relationship on every bar, unranked, updated with each close — the rating tells you where a stock stands in the field, the line tells you how it got there and whether it is still going. Both measure against the same benchmark, so a chart and its RS badge tell one story.

The line and the dots are on for everyone, on every plan, on every stock page. Either can be switched off from the chart settings cog or your Account page. A day the index hasn't reported yet is left blank rather than guessed, so the line may end a bar before the price does.

A screen for stocks whose RS line has just made a new high is the obvious next step, and it's on the list. As always, let us know what you think.