What is the difference between spot pairs to USD and USDC for Coinbase?

On the Coinbase platform, USD and USDC markets are unified and have the same chart. However, we provide separate charts for USD and USDC pairs on TradingView for better distinction during trading. Their historical and streaming data come from the same data source. Based on a user account type, one of the pairs can be non-tradable.

Exceptions:

• USDTUSD and USDTUSDC are completely different charts with separate data sources, as well as on the Coinbase platform;
• EURCUSDC has no correspondent EURCUSD chart, as well as on the Coinbase platform.