Can a Dashboard Show Ratio Metrics Across Marketplaces?

How ratio metrics stay accurate in a combined view

When dashboards combine Amazon Ads data from multiple marketplaces, they should not average individual ROAS or ACoS percentages. Instead, the dashboard recalculates those metrics from the same source values used in each report—ad spend, attributed sales, clicks, and orders. That keeps the combined view consistent with the performance of all included accounts.

• ROAS uses attributed sales divided by ad spend.
• ACoS uses ad spend divided by attributed sales.
• Other KPIs such as clicks and conversion rate remain available per account or combined.

What to look for in a multi-marketplace dashboard

A practical dashboard should accept report files or scheduled imports and show a unified performance view. For teams managing several accounts, drill-down capability matters because combined metrics can hide problems inside a single campaign or search term.

One option is Amazon Ads Dashboard by Todoza, which tracks core KPIs including ad spend, ROAS, orders, CPC, and wasted spend with period-over-period comparisons.

• Unified view across accounts and marketplaces
• Drill-down from account to campaign to search term
• Read-only reporting, so no unintended campaign changes

When this matters

Cross-marketplace ratio visibility becomes important when individual accounts look stable but the combined picture shows a different trend. It also helps agency teams compare performance across clients without manually rebuilding reports in spreadsheets.

If you are reviewing weekly performance or looking for wasted spend, a dashboard that preserves ratio metrics gives you a more reliable starting point for decisions.