If you plan to stay in the crypto space for the next few years and aspire to make trading a second profession, you must read these 16 iron rules. They are practical tips for making a living from trading, and it's recommended to save them! 1: The common problem for retail investors worldwide is holding on to losses indefinitely, and selling as soon as there's a small profit. They don't look at trends or trading volume, only at account profit and loss ratios. The result is unlimited losses and limited profits. A reverse strategy is needed: hold onto profits indefinitely and cut losses at the slightest dip. My profit-taking and stop-loss principle is to take profits at 15%, and stop-loss if profits fall to 10%. If it continues to rise, hold on and let profits run. If the price drops after buying, stop-loss if the loss exceeds 5% of the principal. If you can ensure a 10% profit-taking and a 5% stop-loss each time, then after 100 trades, even with only a 50% win rate, your returns will reach 800%. Is that difficult? The hard part is human greed and fear; knowing and acting as one. 2: I have always believed that trading volume is a very important indicator. Mastering this will allow you to outperform 80% of traders. A volume ratio (量比) less than 0.5 indicates a significant decrease in volume. If volume decreases but makes new highs, it indicates that the main players have a high level of control, and it can rule out the possibility of them offloading their positions. If it's just in an upward channel, the chances of making profits are extremely high. If a stock hits the limit up and the volume ratio is less than 1, it signifies that there is still considerable room for growth, and the likelihood of rising again the next day is very high. If the volume ratio is greater than 1.5 and the stock pulls back after breaking through a significant resistance level (like the 20-day moving average), it becomes a rare buying opportunity.