The phrase "a true indication" is correct and usable in written English.
You can use it when referring to something that accurately reflects or represents a particular situation or condition.
Example: "The results of the survey provide a true indication of customer satisfaction with our services."
Alternatives: "an accurate reflection" or "a genuine sign".
To ensure that the test was a true indication of calf endurance, participants from the case group were asked to indicate whether heel pain or calf muscle fatigue limited their performance.
He said the findings were nonspecific and not a true indication of the presence of hormones.
The size of the bird in his pictures is a true indication of his distance from his subject.
"Heart rate doesn't give a true indication – you can have high heart rate if you don't feel well.
Studying lists of free-kicks conceded, corners taken and passes gone astray will never give you a true indication of the home team's performance.
The final score was not a true indication of the disparity between the teams, who were playing for the 73rd time.
Mr. Lambert said he considered Mr. Bush's aggressive courtship of religious conservatives in the South Carolina primary as a true indication of his political compass.
The Giants sense that their 21-16 victoverover an injury-ravaged Arizona team was not a true indication of where they stand.
2) Search for valid and reliable process numbers that give a truer indication of performance.
Deutschman gives a truer indication of his quest by quoting the computer industry pundit Stewart Alsop, who posits that the major computer companies that are still run by their founders (Apple, Oracle, etc).
"The Dutch auction system has been faring very poorly after many different auctions over the years, and I believe the traditional form of bringing I.P.O.'s to the marketplace is a truer indication to investors of where after-market demand is," he said.
