The cold light emitted from the phone screen cuts through the night, and urgent breathing comes from the other end of the line— a trader who has been with me for a year, fully short on a certain coin, with 10,200 US dollars instantly wiped out in a 3% minor pullback.

I remained silent for a few seconds. Not out of surprise, but a familiar suffocating feeling. Five years ago, I had walked this path too, pushing all my chips to the center of the table, taking "going all in is faith" as my motto. As a result, a market manipulator caused my account and dreams to shatter together.

**Full position is the高速通道 to exit**

I asked him to send over the trading records—10,200 US dollars all in, with no stop-loss set. That’s called "dying from recklessness." Many dream of turning the tide with heavy positions, but they never consider that the fuller the position, the narrower the room to survive.

Let’s do the math: with 1,000 US dollars and 20x leverage, a 5% drop in the coin price means total loss; but if only 100 US dollars are used with the same leverage, it takes a 50% drop to get wiped out. The difference isn’t in market analysis skills, but in that "survive" insurance. Opportunity? The market never lacks it. What’s truly scarce are the people who can survive until the opportunity arrives.

**Three laws summarized from blood and tears**

Over these years, I’ve seen too many people fall before dawn, and I almost became one of them. The three iron laws I’ve learned through struggle turned a 2,000 US dollar principal into over 400,000 US dollars:

**Never risk more than 20% of total funds on a single trade** — even if you get stopped out, it’s just a scratch. Black swans love to knock on your door when you least expect it, so always keep your ammunition stockpile full.

**Set a 3% loss limit per trade** — even if you see the right direction, you can still get shaken out. This red line guards against emotional trading and repeatedly adding to positions to average down, which is the real cancer of an account.

**Discipline during volatility > intuition during rapid surges** — market fluctuations are routine; emotional collapse is the real killer.