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?

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 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?

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

How exactly does a mercenary operate in the stock markets?

How exactly do put options work in the stock markets?

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

What exactly are Elliott Waves and how are the useful in technical analysis for traders to take positions?

I hear the use of the word Trend quite often in technical analysts. What exactly is meant by trend?