Field note
When a strong ratio is a weak benchmark
Ratio charts can flatter mediocre names when the comparator is drifting lower. Here is how we catch that in class.
A rising ratio chart is persuasive. Price of A divided by price of B climbs, so A “outperforms.” Students often stop there. In technical analysis training we force a second look: what is B doing on its own?
Soft bases create soft heroes
If B is in a persistent decline, many ordinary names will print rising ratios against it. Relative strength comparison still reports the maths correctly; the interpretation is what fails. Leadership against a collapsing peer is not the same as leadership against a healthy universe.
A quick cross-check
- Inspect B’s absolute trend over the same lookback
- Rebuild the ratio against a broader, healthier base
- Ask whether A still ranks near the top of a peer table
If A only looks brave when B looks ill, demote the story.
Classroom example pattern
We often take a mid-cap industrial that “beats” a single struggling peer and then rebuild against the sector ETF. The second ratio usually cools the excitement. That cooling is useful. It is the point of the drill.
For guided work on your own watchlist, private comparison coaching spends most of the ninety minutes on exactly these cross-checks.