TCG Hacker is a web based tool and Chrome extension designed for tracking prices and market data for the One Piece Trading Card Game. Its primary function is to provide real time price information for individual cards, including both raw and graded versions from PSA and BGS. The platform also offers market analytics and investment oriented features to help users identify undervalued cards and monitor market trends. The tool includes a portfolio building feature that allows collectors and investors to track the value of their collections over time. Users can access price history, compare graded versus ungraded values, and receive alerts on price movements. The Chrome extension integrates with online marketplaces to display price data directly during browsing. Typical use cases include evaluating potential purchases, monitoring the performance of a collection, and researching market trends for investment decisions. The workflow often involves searching for a specific card, viewing its current market price and historical data, and adding it to a portfolio for ongoing tracking. The extension streamlines this process by overlaying price information on external sites. Technical requirements include a modern web browser and the optional Chrome extension for enhanced functionality. The platform is accessible via the tcghacker.com website and does not require account registration for basic price lookups, though portfolio features may require an account. The data is updated in real time from multiple market sources.