Learn how to use increase and decrease arrows to show trend in Excel.br br In this video, we utilize up and down arrows (increasedecrease) to demonstrate how data sets vary based on the specified percentages. Positive numbers display with an up arrow, whereas negative numbers display with a down arrow.br br Here are the steps.br 1) Select cellbr 2) Ctrl + 1br 3) Number tabbr 4) Custombr 5) Enter following in Type.