The phrase "upward trajectory" refers to a continuous and consistent path of progress or improvement, where something is moving or evolving in a positive direction. Full definition
It's hard to find projections for both global energy demand and emissions of carbon dioxide from fuel burning that don't have a sustained upward trajectory for decades to come. (dotearth.blogs.nytimes.com)
The cryptocurrency market has been on a steady upward trajectory over the past few years. (knowtechie.com)
Such results are a far cry from the steep upward trajectory that global firms have long enjoyed. (legalblogwatch.typepad.com)