Mansfield Relative Strength: Spot Stocks Outperforming the Market
Mansfield Relative Strength is a comparative momentum indicator that measures a stock's return against the S&P 500, showing you whether it's genuinely outperforming or just riding the market's coattails. I've been burned too many times by stocks that looked strong on their own chart but were actually lagging the broader market — this indicator fixed that blind spot for me.
Most traders obsess over whether a stock is going up or down. The better question is whether it's going up faster than everything else. MRS answers that with a single line normalized around zero. Above zero means outperformance. Below zero means the stock is underperforming. No guesswork.
When AAPL was up 2% in a day last November but the S&P 500 gained 3.1%, MRS showed a negative reading. I'd have missed that warning if I only stared at AAPL's green candle. That's the whole value of this tool — it forces you to compare, not just observe.



