The answers will be posted this week. All markets should be traded the same. You should trade the same number of shares or contracts for each market. You should be able to let open profits become losses. Fundamentals should be consulted for entry only.
Big traders can move the market.
They have advantages over the little guy. When you enter a trade you should know exactly where your exit will be. Trade long or short. Don't trade both. Looking at quotes during the day is very helpful.