curve, drift, swerve, slue, slew, cut, style, vogue, tendency, course, more...

stagnation, decline, regression, outdatedness, unfashionable

fad, trendoid, trendoidism, trendoidist, trendoidity, more...

general, upward, downward, new, same, current, similar, recent, term, present, overall

become popular,   graph line,   latest thing,   fashion craze,   it's usually a fad,   shift towards,   fashion style,   big movement,   general tendency,   spawn plain craze