The phrase "a fundamental indicator" is correct and usable in written English.
It can be used when referring to a key measure or sign that reflects the state or condition of something, often in contexts like economics, health, or performance metrics.
Example: "The unemployment rate is often considered a fundamental indicator of the overall health of the economy."
Alternatives: "a key measure" or "a primary sign".
The family environment is also a fundamental indicator of disease risk.
The composition of a landscape is a fundamental indicator in land-cover pattern assessments.
To this end, we present here a targeted quantitative structure property relation (TQSPR) for the laminar burning velocity, which is a fundamental indicator for the quality of fuels for spark ignition engines.
In particular, since plant species richness is a fundamental indicator of biodiversity at the community and regional scales, attempts were made to predict species richness (spatial heterogeneity) by means of spectral heterogeneity.
Benzo[a]pyrene (BaP), which has been extensively investigated, is one of the more potent carcinogens among PAHs and is a fundamental indicator of exposure and carcinogenic activity of all PAHs.
As carbon pricing becomes integral to global economics, "cost of carbon" will gradually emerge as a fundamental indicator in evaluating corporate near-term performance and management, as well as strategic vision and prudence.
Gait velocity is an objective, fundamental indicator of post-stroke walking ability.
Or you could make an indirect bet on a fundamental economic indicator like interest rates.
Investors who wish to employ the best fundamental indicator should add free cash flow yield to their repertoire of financial measures.
Despite terrorist attacks, a sagging economy and the possibility of a war in Iraq, none of these fundamental indicators has changed a whit.
Childbearing within cohabitation has been one of the fundamental indicators of whether a relationship has become more marriage like (Manning 1993; Raley 2001; Musick 2007; Kiernan 2004).
