Relative Strength (RS), Explained

Before asking whether a stock is cheap, well-run, or well-loved, there's a simpler question: is the market already voting for it with real money? Relative Strength answers that in one number.

What RS actually measures

Relative Strength ranks a stock's price performance against every other stock in the market on a scale of 1 to 99. An RS of 90 means the stock has outperformed 90% of the market over the measuring period. It says nothing about fundamentals, valuation, or story — it measures one thing: where the money already went.

DataQuant's formula

Every stock DataQuant scans gets a weighted trailing return — 50% weight on the 3-month return, 30% on the 1-month, 20% on the 1-week — so durable strength dominates but recent momentum still counts. That score is then percentile-ranked against the entire scanned universe, roughly 1,466 US stocks at present. Crucially, the ranking is per-market: a US stock is ranked against US stocks and an Indian stock against the Indian universe, because "leading" only means something relative to the pond you swim in.

How the percentile actually works

Percentile ranking is what makes the number honest. Line up all ~1,466 scanned US stocks by their weighted trailing return, worst to best, and each stock's position in that line — expressed 1 to 99 — is its RS. An RS of 80 means the stock outran roughly 1,170 of its peers; an RS of 45 means most of the market did better. Because it's a rank, not a raw return, RS is self-calibrating: in a roaring market an RS of 90 demands spectacular performance, and in a falling market a stock that merely declines less than everyone else can still rank as a leader. That last property matters more than it sounds — the names that fall least in a correction are disproportionately the ones that lead the next advance, and RS spots them while their charts still look unimpressive.

Why leaders lead

The uncomfortable, well-documented market truth behind RS is that strength persists. The stocks with the highest relative strength at the start of an advance disproportionately become its biggest winners. William O'Neil built the "L" of his CANSLIM method on it — Leader, defined by a high RS rating. Mark Minervini simply refuses to buy a stock that isn't already showing relative strength.

The mechanism is human: institutions cannot build a meaningful position overnight. They accumulate the best names over weeks and months, and that sustained buying is exactly what a high RS detects. You are not predicting leadership — you are reading the footprints of money already moving.

The classic bar: RS ≥ 70

There is no magic line, but leadership-based methods generally want a stock outperforming at least 70% of the market before considering it — and the biggest winners typically set up in the 80s and 90s. DataQuant's dashboard has a one-click RS ≥ 70 filter that reduces the signal list to leaders only.

How to avoid fooling yourself

• RS is a filter, not a trigger. It tells you which stocks deserve attention, never when to buy. Pair it with a proper setup — a base and a breakout — and a predefined stop.
• Beware extreme readings late in a move. A stock that has already run for a year can carry a blistering RS precisely because the easy gains are behind it.
• High RS ≠ safe. RS measures price, not risk. Leaders fall too — which is why every DataQuant signal ships with a stop.

RS works best combined with the rest of the toolkit: a leader (RS ≥ 70) building a quiet base (a VCP) in a market that rewards breakouts (the Market Health gauge).