In the long run, a good trading system can give you a winning number, but in the short run, the market is highly random. The outcome of any trade is as uncertain as flipping a coin. A professional trader expects to be profitable at the end of the month or quarter, but if you ask him whether he will make money on his next trade, he will honestly say he doesn't know. That's why a stop-loss strategy is used: to prevent a failed trade from ruining his account.
#新币挖矿&盘前交易USUAL
