The phrase "a much better indicator" is correct and usable in written English.
It can be used when comparing the effectiveness or reliability of different indicators or measures.
Example: "In this study, we found that the new method is a much better indicator of success than the previous one."
Alternatives: "a significantly improved measure" or "a far superior sign".
The results also indicated that the SOURNMAX is a much better indicator of improving or worsening sludge performance and capacity than the SOURAT.
Historically, the answer is "not bad", although they will probably be a much better indicator by the morning of 8 November rather than now.
But in their hearts and weary legs, skiers know that maintaining excellence throughout an entire season over many different courses and in varying snow and weather conditions is a much better indicator of overall ability.
The transfer entropy is a much better indicator of dynamical changes than the modal techniques.
Weekly earnings are a much better indicator of the standard of living.
In fact, a different degree is a much better indicator of future wealth an M.D.
Thanks to the breadth and depth of the data from a large number of transactions (relative to equity real estate), the CMBS indexes are a much better performance indicator for their respective markets than those for their equity counterparts.
(4:11) Google's data shows brain teaser-style interview questions don't predict performance, rather structured interview questions are much better indicators.
Interestingly GCaMP5K-PSD95, a probe located near the postsynaptic density, revealed only a very small number of events that fulfilled our detection criteria while soluble probes proved to be much better indicators.
A recent study (Kelkar et al. 2008) conducted on long orthologous microsatellites from the human and chimpanzee genomes concluded that STR intrinsic features (length and period) are much better indicators of STR variability than extrinsic factors (GC and recombination rates, distance to telomere, Alu and L1 contents).
Building a model to pinpoint outbreaks of the sniffles based on geo-located tweets, where users mentioned the symptoms, means that by choosing the right "indicator" data it would deliver a much better accuracy.
