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.

Origin of trendline

1910–15 for more general sense; trend + line1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for trendline