A win/loss sparkline is a visual representation of a data series in only one cell, the image above shows a blue column if the corresponding value is positive, nothing if zero and a red column if the value is negative.
How to build
Click on a cell where you want the sparkline.
Go to tab "Insert" on the ribbon.
Click "Win/Loss sparkline" button to open the "Create Sparklines" dialog box.
Select the cell range that contains the data.
Click OK button.
Click and hold with left mouse button on the dot shown in the above image, then drag down as far as necessary to create sparklines for each data series.