In spite of the fact that the uncertainty of outcome connects the two, investment and trading are unlike gambling, the critical difference being that gambling creates risk while investment and trading redistribute the risk intrinsic to markets. Further, gambling is a negative expectancy game whereas the investor or trader is almost always involved with positive expectancy. In practice, this distinction and the statistical advantage in investment and trading can quickly disappear. This will be so where there is not the knowledge that one is trading on a curved surface. And also, where one is without at least an approximate understanding of the contour of that surface and one’s point or path upon it. It is knowledge of the curve that enables a decision as to criterion and how best to achieve it. Therefore, technically speaking, it is knowledge of the curve that separates a trader from a gambler in trading. It is my view (after 13 years of trading) that no more than 2 -3 percent of retail traders understand the curved surface or indeed the fractal environment (i.e. fractured price curves) they trade. Not being a gambler in trading is not a matter of following a simple set of rules (heuristics) - it is about knowledge. Knowledge of the mathematized environment in which they operate. This is clear and obvious from the success ratio of retail traders widely reported. A word is enough for the wise.