Inventory Management & Forecasting

Running out of stock on Amazon means lost sales, damaged rankings, and lost Buy Box eligibility. Over-ordering ties up capital and triggers Aged Inventory Surcharges (formerly long-term storage fees). SellerLegend's Inventory Management & Forecasting system helps Amazon sellers maintain optimal inventory levels using sales velocity calculated from your own order history. Our system calculates sales velocity across multiple configurable time windows - short-term (3, 7, 15, 30 days), longer-term (90, 180 days), and year-over-year anchors (same month and same quarter last year) - to account for seasonal trends, promotional spikes, and long-term growth patterns. You choose how those windows combine (average, maximum, or minimum), exclude out-of-stock or inactive days from the denominator so velocity reflects true selling days, and can override with a manual value for new launches or seasonal SKUs. See exactly how many days of inventory remain for each SKU based on current sales velocity, helping you prioritize reorder decisions. Automated reorder recommendations calculate optimal order quantities using lead time, sales velocity trends, and target inventory coverage days. Aged stock is tracked by age band so you can see which units are drifting toward the Aged Inventory Surcharge, which Amazon now assesses monthly rather than twice a year, and act while liquidation or a removal order is still the cheaper option. Track inventory across all Amazon marketplaces in one view, monitoring stock levels, inbound shipments, reserved inventory (customer orders and FC transfers), and unfulfillable units. SKUs whose days of supply fall below your alert threshold are flagged in red, so you can see which products need immediate attention. Historical inventory level tracking helps identify ordering patterns and optimize your replenishment cycle. Integration with COGS data provides inventory valuation reports showing total capital tied up in Amazon warehouses.