ChartBuy — 90-Day Price History & Promo Code Finder

Check verified 90-day price history charts, expose inflated seller MSRPs, and unlock stackable promo codes while shopping online.

ChartBuy Pro is a fast, lightweight price history and coupon assistant designed for smarter cross-border online shopping. Whenever you open a product page on AliExpress, ChartBuy automatically displays a clean floating price terminal in the bottom-right corner—helping you verify whether a discount is genuine before you buy. KEY FEATURES • Real 90-Day Price History Chart: Instantly inspect the 90-day price trend, 90-day average benchmark, and historical all-time low directly on the product page without opening extra tabs. • Fake Strikethrough MSRP Detector: Automatically compares seller-claimed "original prices" against verified 90-day catalog averages to warn you against artificial pre-sale markups. • Buy-Timing Score (0–100) & Store Trust Check: Evaluates current price positioning and seller positive feedback ratings at a glance. • Active Promo Code Finder & 1-Click Copy: Surfaces verified regional promo codes applicable to your order tier and syncs newly discovered public campaign coupons across 5 language editions. • Smart SKU Option Detection & Memory: Automatically detects your selected product variant and remembers whether you prefer the chart panel expanded or minimized as you browse. • 5 Core Languages & Local Currencies: Switch seamlessly between English (USD), Korean (KRW), Spanish (EUR), Portuguese (BRL), and Japanese (JPY). PRIVACY FIRST (MANIFEST V3) • Zero Personal Data Collection: ChartBuy operates strictly on public catalog pages. It never reads passwords, payment details, shopping carts, checkout forms, or browsing history on unrelated websites. • Independent Tool: ChartBuy (chartbuy.com) is an independent price analytics service and is not affiliated with or endorsed by Alibaba Group or AliExpress.