Discount tools control the inputs — a percent off, a code cap, a schedule — but don't check whether the order stays profitable once shipping, fees, and stacked discounts apply. Margin Protector calculates true margin on every cart at checkout using your product costs and the cart's actual discounts, shipping, and fees. If margin falls below your threshold, the order is blocked or flagged with a warning, based on rules you set per product or store-wide.

• Block or warn on checkouts that fall below your minimum margin.
• Choose between warn-only or hard-block modes for unsafe checkouts.
• Simulate a discount before launching it to see the margin impact.
• Audit every product's current margin in a single dashboard.
• Suggest safer discount alternatives when a code would lose money.