trender

Something which trends (has a tendency to go) in a certain way.

The computer can ferret out slow-movers, down-trenders, and nonstandards, which leads to simplification and higher turnover.

The other functions which have significant trends (accounting for 93.8 percent of total unified budget outlays at the mean) total 17.6 percent of potential GNP. Measured at the means, there were more dollars involved in downtrends relative to the economy than in uptrends (due almost entirely to the presence of Function 050 (National defense) among the downward trenders).

Someone who is trendy, who sets or follows trends.

I also saw, or thought I saw, a very similar clash of assumptions, hypotheses and explanatory styles between the tenets of the old orthodoxy (a mixture of behaviourism, structuralism, cultural relativism, Wittgensteinian holism and Piagetian constructivism) and the ideas of the new trenders.

One who cleans the filth from wool.