The emergency call at 2 a.m. came from a trader who was fully long. Investing 10,000 USDT with 10x leverage, just a 3% pullback wiped out their entire position. Looking at their trading record, they went all-in with 9,500 USDT in a single trade, without even setting a stop-loss.

This is a common problem for many people. They mistakenly believe that full position size means strong risk tolerance, but in fact—the opposite is true—using full leverage improperly often leads to the fastest liquidation.

**The key is not leverage, but position size proportion**

For the same 1,000 USDT account:
- Using 900 USDT with 10x leverage, a 5% adverse move results in liquidation
- Using 100 USDT with 10x leverage, it takes a 50% move to be liquidated

That friend invested 95% of their capital; no matter how small the leverage, it couldn't save them.

**Three ironclad rules to make full position trading more stable**

First, never risk more than 20% of total funds on a single position. For a 10,000 USDT account, a maximum of 2,000 USDT per trade. Even if you’re wrong and stop out with a 10% loss, that’s only 200 USDT lost, keeping the principal intact and allowing room to recover.

Second, set a maximum loss limit at 3% of total funds. For example, with 2,000 USDT at 10x leverage, set a 1.5% stop-loss in advance, which results in a 300 USDT loss. Even a few consecutive wrong trades won’t break you.

Third, observe during sideways markets, never add positions after profits. Only enter when a clear trend breaks out. No matter how tempting sideways trading is, stay on the sidelines. Once in a position, firmly avoid adding more, letting the trading logic rather than emotions guide your decisions.

**The true meaning of full position**

The original purpose of full position sizing is not gambling, but to reserve buffer space for volatility—assuming light position sizing combined with strict risk management. One trader previously kept blowing up every month, but after following these three rules, he grew his account from 5,000 USDT to 8,000 USDT in three months. He later said, "I used to think full position was gambling, but now I understand—it’s about surviving longer."

In the crypto world, it’s not about who makes money faster, but who survives more steadily.