There are plenty of other benefits too but none interest me personally. Other features that I use like scripting, scanners, etc, come with the free version.
You must try the free trial of pro version - get an idea of how helpful it is.
This site is sure that I best I know so far, especially the social community of traders makes it awesome.
Could you suggest me some book?
"Technical analysis explained" by Martin Pring
This is one is like the textbook of Technical analysis. Got everything you need to know.
If you are completely new, then you may watch these series on youtube.
That should get you started.