The phrase "a perfect indication of" is correct and usable in written English.
It can be used to describe something that clearly demonstrates or signifies a particular quality, condition, or situation.
Example: "The consistent rise in sales is a perfect indication of the effectiveness of our new marketing strategy."
Alternatives: "a clear sign of" or "a definitive proof of".
Banner's best song is a perfect indication of how hard it is to file him.
That's a perfect indication of the tightness of this race, which will likely come down to a photo finish.
Financing data tracked by one law firm is not a perfect indication of success, but it does demonstrate what financings have looked and felt like over the past seven years.
His new tune "Whoa" is a perfect indication of this, all upfront, good-times vibes, despite the ominous synths that oversee affairs.
The filmmakers and distributors are evidently ignorant of the significance of the date -- a perfect indication of the carelessness and thoughtlessness of the film, which will unfortunately substitute for actual history in the minds of many Americans.
The weekend military strikes on terrorist targets in Libya and Somalia are a perfect indication that the American government can act when its direct interests are at stake, said Ms. Dormandy of Chatham House.
On the other hand, IndVal varied between 0 (no indication) and 100 (perfect indication), being highest when all individuals of a species are found in a single habitat (high specificity) and the species occurs in all samples of that habitat (high fidelity).
Many of these barriers represent perfect indications for referral to rehabilitation services.
The examiners were calibrated and the reliability test in recording periodontal diseases gave an almost perfect agreement [ 31], a further indication of the consistency of the findings of this study with previous studies.
Grosjean's feats over the last two days are a perfect example of how headline times in pre-season testing are a notoriously poor indication of true form.
