Create cursors without the style and point set to blank...now set the name of the cursor, show the label...and place the cursor at the coordinates of the point you want to label. You may need to adjust the coordinates to somewhat to align the name better to the point though.
Another option is to actually move around a set of string indicators (preferably with the indicator frame set to transparent)...but cursors are more flexible and neater.
I have attached a simple example where the highest and next highest value on a graph is labeled.