"solid indicator" is a correct and usable phrase in written English.
You can use "solid indicator" to describe something that serves as strong evidence or proof of a certain concept or idea. It can also refer to something that reliably indicates the presence or state of something else. For example: - "The increase in sales is a solid indicator of the company's success." (meaning: the increase in sales is strong evidence of the company's success) - "The unemployment rate is a solid indicator of the state of the economy." (meaning: the unemployment rate reliably indicates the state of the economy) - "His body language was a solid indicator of his discomfort with the situation." (meaning: his body language strongly indicated his discomfort with the situation).
Or is a first-class honours degree still a pretty solid indicator of professional potential?
Tensions between CHQ and the travelling party is almost a cliche in Australian elections - it's usually a solid indicator of which party is the losing side (although it wasn't in the 1993 election).
But a somewhat more solid indicator of unread books emerged in 1985 when Michael Kinsley, then of The New Republic, acted on his suspicions about reading habits in the nation's capital.
So much so that Luis Gutiérrez, a Democratic Congress member for Chicago who is of Puerto Rican descent, dared to interpret the poll results as a solid indicator that "Donald Trump is going to lose Florida and lose the electoral college, and Puerto Ricans in particular will be a huge part of Hillary Clinton's victory".
"We cut earnings per share to below consensus to reflect this … we now forecast [ITV] third quarter [ad revenues] at -1.75% (+5% before)." How TV ad spend pans out in September will be key as it is always a solid indicator of the strength of the final three months of the year, when big ITV shows such as The X Factor return.
While it's not exactly the word of Cook, their data should be a pretty solid indicator for relative trends.
Solid indicators to measure different dimensions of anthropogenic resource use are essential for designing appropriate policy measures for a sustainable management of these resources.
In the best of cases, supply chain reports offers some vague insight into the larger picture of Apple's inventory channels, but when looked to for solid indicators of performance, they're about as dependable as using a magic 8 ball.
Although the concept of social equity seems to be ubiquitous in most mobility plans of major Latin American cities, when evaluating transport projects for financing and prioritisation there are no specific or solid indicators to measure how they can contribute to promoting better access to opportunities, particularly for the most vulnerable segments of the population.
Increased protein levels of inflammatory cytokines (IL-1β, TNF-α) and catabolic factors (ADAMTS-4, ADAMTS-5) are considerd to be solid indicators of inflammatory catabolic changes in intervertebral discs [ 16– 18, 58– 60].
Furthermore, the interaction between these indicators and country context needs to be assessed on the basis of more solid outcome indicators.
