Can Discounts show a price strike-through when a product is on sale?

A strike-through (a line through the original price) is not appearing on my product prices even though they are in a sale in Bold Discounts. How can I fix this?

Bold Discounts does not directly apply a strike-through to product prices. Bold Discounts moves your original price to the compare-at price field and puts the new, discounted price in the regular price field. While most themes then display a strike-through on the compare-at price, some don't. If your theme isn't showing a strike-through, you'll need to contact your theme developer to add this feature.