Too many indicators kill the trade and the trader. But it is important to know the basic/ important ones. I think TA module by NCFM is really a good one. It has all the right content in simple language.
One can download the material from here
Steve Nison- Japanese candlestick charting techniques
1) One of the most popular books to start with is Technical Analysis of the Financial Markets by John Murphy. It's a comprehensive book which covers the field of technical analysis and indicators .
2) To remain updated on latest indicators you can have a look at www.traders.com, where experts explain their indicators and the codes are also available for free.
You can check this link for books: http://tradingqna.com/754/which-are-the-top-books-one-should-read-become-better-trader?show=754#q754