Late at night, a friend's voice trembled as she said: "I went all-in with 20,000 yuan, and it was gone after a 3% drop..."

I looked through her trading records. She basically entered with full position, without even setting a stop-loss. This isn't trading at all; it's simply risking all her assets to gamble on a direction.

Many people think that going all-in can make big money, but they don't realize that only the risk is amplified. For example: with a 10,000 yuan account, using 9,000 yuan to leverage 10x, a 5% market move against you will blow the account. But if you only use 1,000 yuan, the market would have to drop 50% to threaten you—that's the survival space.

Since that time, I set three strict rules for myself:

**First: Do not open a position exceeding 20% of the total account**

With a 10,000 yuan account, only use 2,000 yuan. No matter how much it drops, this single trade will at most lose 2%-4% of the total funds, avoiding fundamental damage. I've seen too many people go all-in in one shot and end up forced to close positions.

**Second: Each loss must be controlled within 3%**

Set your stop-loss before opening the position; don't wait until liquidation to regret. For a 2,000 yuan position, a 1.5% stop-loss means a maximum loss of 300 yuan—that's exactly 3% of the total funds. Discipline is more important than anything.

**Third: Only trade in the trend, take profits and then exit**

Ignore sideways markets. Only act when the direction is clear. After making money, move your stop-loss to protect profits; avoid emotional position additions. This is the most common mistake.

A fan used to blow up his account every month, but after following these three rules for three months, he turned 5,000 yuan into 8,000 yuan. He finally told me: "I used to think that small positions meant I lacked courage, but now I understand that small positions are for staying alive forever."

In this market, surviving longer is much more important than earning quickly. Real opportunities only go to those still standing. Opportunities come and go, but you have to stay alive to catch them.