Quote from ACM Trader:
For me gambling is not taking a position in a stock but rather risking too much on that position. I trade 2 systems. 60% in System 1. In this system, I allocate no more than 10% to an individual stock. So, if I lose 100% in that individual stock, I lose 6% of my total capital. This is the way I trade. When a stock is screened by my criteria, I have to buy it, no exception. This system generates about 600/700 trades per year. I have a lot of pretty winners in many industries, including bio-tech. Because, yes, successful trading requires taking risk. The difference between gambling and trading is essentially risk management.