It's from this thread... http://www.elitetrader.com/vb/showthread.php?threadid=11618 First, my comment was there is no "common" common sense. I was born and raised in Japan, then moved to US 10 years ago. Common sense in Japan and in the US is different. What is common sense in business is not a common sense in some religious common sense. With the market, what I thought be common sense trading actually ended up to be wrong. When I started back-testing strategies, what I thought to be common sense ended up to be a losing strategy. When I started it was hard for me to create a system with profit factor of 1.5. After 5 years, I can come up with one in 10-20 min. from knowledge and experience. My common sense in creating a strategy has realistically adjusted and changed... When I traded the markets... I was losing a lot. I had a good system but I still lost or underperformed. I have learned and adjusted and it's common sense for me... So what is common sense for me since I was in Japan has changed to the American lifestyle, System Programmer, Mechanical Trader, to now a Discretionary Trader... I've been opiniated based on experience... what do you all think?