What tools or software do you use for demand forecasting on Amazon and Walmart?

First, we use APIs connected to Amazon and Walmart to pull sales and inventory data. We then structure product groupings in our product information management (PIM) table. We push those data blocks into GPHD Streamline for statistical and manual demand modeling. Using tools like Streamline allows us to be based in data while also making overrides to variables the data is unable to predict.