A universal shopping cart is provided that obtains and orders products and services from different merchants located on the Internet. The consumer completes all of their shopping on the shopping site and is not directed to another merchant's site to complete an order. The universal shopping cart provides a monitoring service that allows the consumer to monitor a product for specified criteria. The order injection system places orders for products contained within the universal shopping cart from affiliated and non-affiliated merchants. Specific ordering details required from merchants external to the shopping site are hidden from the consumer. For external merchant sites that require a consumer account before allowing the product to be purchased, the shopping site creates a new consumer account without intervention from the consumer. Once the products are ordered, the consumer may keep track of the ordered products from the shopping site.