I get passive income from stock dividends. Most people who trade for a living spend a lot of time looking at charts (if into technical analysis) or doing research (if investing based on fundamentals). I wouldn't call stock trading passive unless you have a fully automated system. I've seen plenty of people lose more money doing this through paying transaction fees and regular income tax over and over again, rather than just holding the S&P 500 for a couple decades.

Yes, probably stock trading is more difficult and the questions is and the question is more suitable for general trade!

How to stay in touch in the market that affect your actions? Sell the action when the price starts to rise, or wait a specific moment?

What do you mean by trading? The index funds that I blindly buy every month give me almost absolutely passive income in the form of dividends and some capital gain. I wouldn't call anything more involved passive.

I mean the action of buy dividends and sold when is possible make a profit. The keys is:

1) Which dividends buy 2) When sell dividends

Half a question, so I'll provide half an answer. $93,917 for 2015. But it ain't "trading" it is "holding".

https://news.ycombinator.com/item?id=10880869

I follow a similar strategy but with fixed income, so my yields aren't as impressive:

https://news.ycombinator.com/item?id=12416278

Sorry, I newest in this field! Your technique is good but that require a solid investment at the first and it has the biggest barriers on enter. I would like to deepen the field of trading but i do not know quite where to start. I am fascinated about high frequency trading. Have you something to recommend?

Thank you.