The phrase "overall trend" means the general direction or pattern that something is moving or changing in, when considering all the different factors or instances together. Full definition
Whether your score is rising or falling can give you an idea of overall trends in your finances, and help you improve the situation if you need to. (creditcardsmarts.org)
However, attempts at mutual adjustments result in increases in some years and decreases in others, with little effect on overall trends. (ipcc.ch)
The graph shows overall trends while the table lists the search engines driving the trends. (lawyerist.com)