Assuming you are referring to viewing charts of your own Coinbase account activity:
To view charts of your Coinbase account activity, log in to your account on the Coinbase website and select the “Activity” tab. On the Activity page, you will see a chart of your account activity, including your recent transactions and their status.
You can also use the filters on the left side of the page to view specific types of activity, such as only completed transactions or only pending transactions.
If you want to view a chart of cryptocurrency prices, select the “Prices” tab at the top of the Coinbase website. On the Prices page, you will see a chart of the current prices of Bitcoin, Ethereum, and Litecoin (the three cryptocurrencies currently supported by Coinbase).
You can use the drop-down menu at the top of the chart to view prices in different currencies, such as US dollars or Euros.