It is best to use the version with registration, as you will get access to all the features of this service. For example, you will be able to save all notes and comments on the chart, as well as customize individual templates. In the full version you will have access to the largest number of scripts and technical indicators, and you will also have a unique opportunity to use analytics of other users and apply the ideas of more experienced traders in your trading. After registration tradingview chart gives you access to the economic calendar, general and private chats of traders.
Registering with Tradingview is very easy. Go to the official website of the developer and click on the free registration button, it is called "Join for free". There is also a button for paid subscription next to it, but you can ignore this offer. However, if you have free 10-20 dollars and you want to get advanced trading opportunities, you can buy a paid account with additional features. For example, the ability to open several charts in one window and install an unlimited number of indicators. There are also exotic types of charts - crosses and Renko, and you can choose any timeframes - even 4 minutes, even 9 hours.