To connect your MetaMask wallet, ensure that you have MetaMask installed and that you are logged in for the browser and window you're using to access https://app.dechart.io.
On the app, click "Sign In" in the top right.
MetaMask will ask for your signature so that our platform can view your wallet, enable trading, activate premium features and enhance overall experience.
To ensure MetaMask is connected, open the browser extension and check to see that in the top left it shows "Connected" and a green dot while viewing DeChart.