I propose that this thread develops a set of questions that one can use to test the knowledge of experts in trading. Could you share intellectual questions that you would ask someone to assess the level of knowledge of that person in trading. You can use the top down, or bottom up approach to sift a guy as you see fit. Example of questions: 1. Why is it that with probability of almost 1, the maximum profit one can make in a period X is 1.8*ATR(X)? 2. Is the opposite-side of a trading system with negative trading expectancy always a positive expectancy (Assume that commission, slippage, bid/ask costs are zero). 3. I would add other Qs, if it is needed and if the thread is useful. You can propose Qs and/or give As.