What this measure is for
The risk regime explains a large share of currency moves, often more than country-specific news. In a risk-off phase the yen and the franc appreciate against nearly everything, without anything having happened in Japan or Switzerland.
The value of the meter is in the coherence, not the level. A score near zero with components contradicting each other describes a market without a common direction — precisely when the usual correlations stop holding.
Read it as context, not as a signal. It says what stage your trade is playing on; it does not say what to buy, or when.