[Risk Management: Calculate How Much You Can Lose First] Before placing an order, first decide the maximum amount you are willing to lose, then determine the position size, rather than looking for a stop-loss after going all in. For example: with a principal of 10,000 yuan, if you are only willing to bear a 1% loss on a single trade, the risk budget is 100 yuan; if the difference between the entry price and the stop-loss price is 5%, the maximum position size is about 2,000 yuan. A stop-loss does not guarantee the execution price, but it can keep the cost of a mistake under control. Do not casually increase your position size because of consecutive wins, and do not use averaging down to cover up the failure of the original plan.