If you have Google Chrome, Brave browser, or Mozilla Firefox, you can connect your Metamask Wallet to Matcha via the Metamask Wallet Extension. Once you have the Browser Extension installed, you can connect to Matcha. Here's how:
Click on the Connect Wallet button from the drop-down in the top-right hand corner or in the trade module.
Click on the Metamask option.
When the pop-up appears on your browser, click "Connect".
Note: if you have multiple accounts in your wallet, you can select specific or multiple accounts to connect.
You can now trade on Matcha with your Metamask Wallet!
Open up a browser on your phone (like Google Chrome).
Navigate to matcha.xyz in the URL field at the top of the page.
At the bottom of the page, select the Connect Wallet button.
Select the Metamask Wallet option when it pops up.
After authenticating, click Connect on the popup on your phone that asks you to connect Metamask to matcha.xyz.
Select the "Browser" button.
Start trading on Matcha!