Most of the time you don't need to pick. Paste a URL and StockWatch detects the platform. The main types:

• Shopify: uses the store's product API, so it's fast and reliable. Great for most Pokemon TCG shops, hobby and indie stores. Can track individual variants (sizes and colours).
• WooCommerce: WordPress stores. Works with most themes out of the box.
• Universal: auto-detects the best strategy for sites that aren't a known platform.
• Custom / Visual Selector: you (or the browser extension's point-and-click picker) choose exactly which elements to watch on any page.
• Site-specific: hand-tuned monitors for particular retailers, with the best accuracy for those sites.

Each supported retailer has its own guide with the ideal settings. Browse them under Supported Sites on the Help home.