"no obvious trend" is a correct and usable phrase in written English.
You could use it when there is no definitive, easily recognizable pattern or direction in any given set of data. For example, "After analyzing the sales figures from the last quarter, there was no obvious trend in our revenue."
The data (below) are from 10 eggs in Europe and the US and there is no obvious trend beyond chance fluctuations.
The PD of armyworm had no obvious trend from 1989 to 2010, and experienced strong year-to-year fluctuations (Fig. 1b; Supplementary Dataset S3).
Meanwhile, the reaction orders over all the specialty and rubber blacks lay between ca. 0.7 and 1, but no obvious trend in the reaction order was discernible with respect to the surface area or type of CBs.
And despite what Romney claimed, there was no obvious trend toward smaller government; Polish spending as a share of GDP was about the same in 2007 as it had been in 2000.
The obtained results interestingly revealed that equilibrium IFT decreases linearly with pressure in two distinct pressure intervals while equilibrium BN shows an increasing trend as a function of pressure for all of the studied cases while no obvious trend is observed for swelling of crude oil and extraction of light-components regarding time, temperature and pressure.
For recruits, no obvious trend was recorded during the monitoring period (2001 2014), except an overall decreasing trajectory of Acroporidae, and a slight increase of Pocilloporidae at 6 m depth at Vaipahu after the occurrence of cyclone Oli in 2010 (see Supplementary Figs S11 to S15).
But these two regions generally show no obvious trend in change of intensity.
However, we can exclude this possibility since the intensity of this peak shows no obvious trend with the etching times.
On the other hand, no obvious trend was found from the phase tensor in the shorter period or the induction vectors in all periods (Figure 2).
Between the enhanced ratio of density and the temperature difference, there is no obvious trend in the ratio due to heating, mainly because the nanofluid is a solid-liquid mixture.
Here, DNA binding activity at gene specific promoters of Xlr, Nr2f1, Zbtb7b, Sprr2i, Ffg18 and ERBB3 was observed with nuclear extracts of transgenic and tumor bearing mice but the overall activity varied considerably (Figure 16b) with no obvious trend.
