or trend line
[ trend-lahyn ]
/ ˈtrɛndˌlaɪn /
an upward or downward line on a chart indicating movements of average prices, as of stocks, over a period of time.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for trendline
We have already seen where that leads us—take a look at the trendline of recording sales, if you have any doubts.Music Criticism Has Degenerated Into Lifestyle Reporting|Ted Gioia|March 18, 2014|DAILY BEAST
One way of answering the question is to look at trendline growth in GDP compared to the anticipated size of any looming recession.