S&P 500 Extreme Breadth Reading! Caution!RSP/SPYBATS:RSP/BATS:SPYRealMacroWhy It Matters Strong breadth = healthy rally, broad participation → more sustainable trend. Weak breadth = top-heavy rally, fragile momentum → prone to correction. Think of it like an airplane: If all four engines (hundreds of stocks) are pushing, you can climb easily. If one engine (a few mega-caps) is doing all the work, you can stay aloft — but not for long! CAUTION! is in order! Click boost, follow, comment nicely for more authentic, no BS, raw analysis. Let's get to 6,000 followers. ))