First, your friend must click on your personal link & create a free account. Once your friend upgrades to a paid plan, you will each receive up to $30 credits in TradingView Coins. Coins can be spent on monthly or annual plans at the moment, with more options to come. You can invite as many people as you like and as often as you like.
1 TVCoin is equal to 1 cent USD, so 3000 coins = $30 USD.