How the Validator scores a product (GO / Watch / Skip)

Paste an ASIN (or an Amazon product URL) into the Product Validator and it pulls the real numbers behind that listing, runs them through five separate checks, and returns one of three verdicts: GO, Watch, or Skip. Alongside the verdict you get a Deal Score from 0 to 100 and a plain-English reason for the call.

Everything starts from measured data, not guesses: current price, Best Sellers Rank (BSR), review count and rating, estimated FBA fees, and the seller landscape on the listing. Lumai AI narrates the result, but it does not invent the numbers it is reasoning over.

Each signal is scored on its own, then blended into the Deal Score by weight. The weights are:

• Marketplace truth (30%) — is this a real, active, selling listing? Driven mainly by BSR (lower rank is better) plus review count.
• Profitability (30%) — your margin after estimated Amazon and FBA fees, using the cost and dimensions you entered.
• Demand foresight (20%) — recent BSR momentum: is the rank trending better or worse over the last stretch of history?
• Trend signal (10%) — independent demand confirmation from social and search signals, when we have a fresh reading for the product.
• Differentiation (10%) — how hard it is to stand out, based on review density, rating quality, and the seller landscape (including whether Amazon itself sells it).

If one signal is missing or stale (for example, no recent trend reading), it is dropped from the blend rather than counted as a zero, so the Deal Score stays fair. A missing input does affect the verdict though — see the rules below.

The blended Deal Score maps to a verdict by tier:

1. 65 or above → GO. The product clears the bar across the signals that matter.
2. 40 to 64 → Watch. There is something promising here, but at least one signal is weak or unconfirmed.
3. Below 40 → Skip. The numbers do not support entering, at least not as the listing stands today.

A few rules can override the raw tier so the verdict reflects deal-breakers honestly:

• Negative margin is a hard stop. If profitability comes out at or below zero after fees, the verdict is Skip no matter how strong everything else looks.
• Both fundamentals weak → Skip. If marketplace truth and demand are both very low, one flattering signal (like paper-thin margin math) will not rescue it.
• Missing data caps you at Watch. If a signal is stale or unavailable, a would-be GO is held at Watch until the picture is complete.
• Trend can promote a Watch to GO when two independent trend sources confirm demand and your margin is already positive.

Watch is the most useful verdict to learn from. When you get one, the Validator lists what would need to change to move it toward GO — for example a lower landed cost to fix margin, or a fresher trend reading to confirm demand. Treat those as a checklist, not a rejection.