亞歷山大·埃爾德博士是美國著名的交易大師和交易教育專家。在他的新著《到我交易室來》（Come to My Trading Room）一書中有許多精闢的論斷。其中有一段特別有意思，現引如下：
“Trading is very different from physics and mathematics, where genius reveals itself early. In science, if you are not a star by the time you're 25,you'll never be one. Trading, on the contrary is an old man's game , and now increasingly a woman's. Patience is a virtue and memory a great asset. If you slightly improve each year, you can grow into a brilliant trader.”
他還引用他的好友泰勒的話：“如果我每年增長0.5%的聰敏，到我死時我就會變成天才”（If I become half a percent smarter each year, I'll be a genius by the time I die.”埃爾德認為這句玩笑充滿了智慧。(There was a great deal of wisdom in his joke) 。
縱觀交易界，許多老年人依舊活躍，光彩不減。巴菲特、索洛斯、威廉姆斯，布林格等等，連羅傑斯也被國人所追捧。反而近年許多青年才俊紅極一時，卻又悄然消失。我想年紀老經歷的事情多必然會增長經驗，增強心理承受力。而按照埃爾德的理論，成功的交易商要具備三個M( Successful trading is based on the 3M's———Mind, Method, Money.———No matter how clever, is responsible for only third of your success. You also need to have sound trading psychology and proper money management.) 然而，經歷的事情多但不長記性也不行，所以記憶力也很重要。孔夫子說過“君子不貳過”，就是說同樣的錯誤不能犯兩次，否則就不是君子。在交易上犯錯誤是正常的。但一再犯同樣的錯誤，那就是朽木不可雕輩了。比如不止損輸光了，以後還是不止損，那有多少錢可以供你輸呢。
