What exactly is Dow Theory in technical analysis and does it really work in the Indian markets?

How exactly does technical analysis work in the markets and can I use technicals for trading equities, commodities and currency futures?

I just read that the GDP growth for the fourth quarter has slowed down to 5.8%. Is the Indian economy really slowdown and what does it mean for markets?

What do we exactly mean by technical analysis in stock markets?

I have heard that technicals are largely based on something called the Dow Theory? What is Dow Theory and how does it work?

I understand that Indian markets operate on the best bid-ask principle. What exactly that and how is it important to an investor?

What exactly is the Percent B (%B) indicator in technical analysis and how is it useful?

I understand that monsoons are very important for the Indian markets. Why is it and what impacts the stock markets in rains so much?

Can you explain how derivatives work in the stock markets with a very simple example?

What exactly is the role that the stock markets play in a country like India?

I hear a lot about shadow banks in India these days. What exactly are these shadow banks and why are markets worried about shadow banks?