Educational reference. Measured from recorded market data through September 11, 2026. Not a forecast.
ADX measures how strongly a market is trending, regardless of direction. This page asks a narrower question than the price comparison: when ADX moves on British Pound / U.S. Dollar, does it move the same way on SPDR S&P 500 ETF?
| Bars where ADX moved on both | 2,062 |
|---|---|
| … and moved the same direction | 1,095 (53.1%) |
| Price correlation, same period | +0.403 |

Two markets can move together while their momentum, trend strength or volatility do not. A reading that agrees far less than price suggests is exactly where one market is losing steam while the other keeps going — and a reading that agrees more is tracking something shared that direction alone does not capture.
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