> ## Documentation Index > Fetch the complete documentation index at: https://docs.arbitrageone.de/llms.txt > Use this file to discover all available pages before exploring further. # How do I use the Analyzer for product evaluation? > Evaluate a single product with Keepa, calculation and direct purchase recording in the Analyzer. ## Short description The Analyzer is your tool for evaluating a single product in depth: Keepa price history, category, estimated sales, Ungatings status, margin calculation and direct entry into the Sourcing Sheet — all on one page. ## Step-by-step guide ### Step 1: Open the Analyzer → Open directly in the app: [app.arbitrageone.de/analyze](https://app.arbitrageone.de/analyze) Three ways: * **From a sheet**: click the **A1-Analyzer** button in a row * **Directly**: menu item **Sourcing → Analyzer** * **Via URL**: `/analyze?asin=B0XXXXXXXX` Empty Analyzer start page with central search field ### Step 2: Search for a product Enter **keyword, ASIN or an Amazon URL** into the search field. Use the marketplace dropdown to choose the target market (e.g. Amazon.de). On an exact match the Analyzer opens the detail view directly. For multiple matches a **result list** appears with mini Keepa charts per marketplace — so you immediately see where the listing is active and pick the right product. Result list for keyword search with Keepa previews per marketplace ### Step 3: Check product data and warning signs After selection, the Analyzer loads all product data (image, category, brand, FBA/FBM offers, MoM drops, reviews, restrictions). **Watch the warning signs in the top left**: ArbitrageOne shows notices when a product is **frequently returned**, has **oversize**, is **Hazmat** (hazardous goods) or carries other critical attributes. You should review these warnings before every purchase decision — they can significantly reduce your margin or block the sale entirely. ### Step 4: Enter purchase and selling price * **Purchase price**: toggle **gross/net** depending on what you calculate with. * **Selling price**: taken from Keepa data or overwritten manually. You immediately see: * **Margin (%)** * **ROI (%)** * **Profit (€)** * **Breakeven (€)** ### Step 5: Choose marketplace, strategy and sheet * **Target marketplace**: flag dropdown * **Sourcing strategy**: your pre-defined strategies (Online Arbitrage, Retail Arbitrage …) * **Sourcing Sheet**: which sheet the deal is saved to * **Source URL**, **tags** and **notes** — all optional and usable for filters later ### Step 6: Check Keepa, approvals and Buy Box In the analysis blocks around the target marketplace you see: * **Keepa chart** for the selected marketplace — price history, sales rank, Buy Box history * **Approvals** per marketplace (Unlocked, Restricted, Not Eligible). A red **"x"** means no approval is possible. * **Buy Box statistics**: share of sellers in the Buy Box over the past months. The more sellers share the Buy Box, the more intense the competition. If Amazon itself dominates the Buy Box, the deal is usually unattractive. ### Step 7: Estimate Europe-wide sales In the **Sell Europe-wide** block you compare **SP, margin, ROI and profit per marketplace** at a glance — ideal for spotting the most profitable target market. ### Step 8: Save or buy directly In the **Record Purchase directly?** section you enter quantity, shipping costs, payment method, shipping address and purchase date, then finish with **Record Purchase** — or just save the deal to the sheet. The **batch mode** at the bottom lets you record multiple purchases in sequence without resetting the Analyzer. Full Analyzer view with product data, calculation, Keepa, approvals, Buy Box, sell-Europe-wide and record-purchase block ## Important notes * The Analyzer uses your current **calculation basics** — if fees change, it recalculates. * The Analyzer can be opened from FlipHunter, Watchlist or externally (callback mode) — the behaviour adapts automatically. ## Common issues **Issue:** "Product not found" despite a valid ASIN **Solution:** Check whether the ASIN exists in the selected **target marketplace**. Some products are only listed in specific regions. **Issue:** Keepa chart doesn't load **Solution:** For some products Amazon suppresses price tracking, or no listing exists in the chosen marketplace for the ASIN. **Issue:** Margin shows odd values **Solution:** Check the purchase price setting (gross vs. net) and your calculation basics under **Settings → Calculation**. Also check the shipping cost for large or heavy items. ## Related articles * [How do I set up my calculation basics?](../erste-schritte/kalkulationsgrundlagen-einrichten)