yes it is possible. We know that Textbox is added to a single cell, so just drag a sparkline object to that same cell and then add the sparkline properties for the values and groups.
Please find more details here:
Answer to your question is yes.We can add sparkline for text box.Because you have added that textbox in cell,so by just drag and drop the sparkline from toolbox.
Please go through this to find some screenshots: