"The Two Iron Rules of Position Management! The Truth About Stable Profits for Professional Traders" and the consensus in the trading community usually refer to these two iron rules as the "2% per trade stop-loss principle" and the "6% daily circuit breaker principle."

Countless traders spend their entire lives searching for a guaranteed winning indicator, but they don't realize that the dividing line between traders and gamblers lies precisely in these two dull numerical rules.
Below is a breakdown of the two iron rules for "life preservation" for professional traders:
🛑 Iron Rule One: Never lose more than 2% of your total capital on a single trade
"Never let any single trade risk more than 2% of your principal."
How to calculate?
Suppose you have a capital of 100k yuan, and the worst-case scenario (stop-loss amount) you set for a trade is only 2,000 yuan. If your stop-loss distance is 5%, then you can only buy stocks worth 40k yuan (40,000 * 5% = 2,000), rather than risking all your cash.
Why 2%?
This is the survival baseline. If you keep your single-loss limit at 2%, even if you are in extremely poor condition today and hit stop-loss 10 times in a row, your total drawdown will only be 20%. You are still alive, your mindset remains intact, and you have ammunition for a comeback.
Harsh truth:
Beginners always think, "This one is a sure thing, go all in," while veterans only think, "What if I’m wrong this time?" Trading is not about who earns faster, but about who survives longer.
🛑 Iron Rule Two: Total risk exposure for the day must not exceed 6% of total capital
"When the account’s daily loss plus potential risk from open positions reaches 6% of the principal, force shutdown, stop all trading."
How to calculate?
Again, using 100k yuan as an example, the maximum total loss you can tolerate today (actual loss incurred + floating loss if stop-loss is triggered on current positions) is 6,000 yuan. Once this line is reached, no matter what shocking good news or insider information about a surge tomorrow, you must not open new positions today.
Why 6%?
This is to prevent "getting carried away." After a series of losses, people are prone to revenge trading, also known as the "gambler’s mode." 6% acts as an emotional firewall, forcing you to cut off vicious bleeding when in poor condition or market trends are unfavorable, preserving the last spark of hope for a turnaround.
Harsh truth:
Bankruptcy often doesn’t come from a single big drop, but from the rush to recover after a big fall. Admitting that you’re not in good shape today takes more courage than stubbornly holding on.
💡 Summary: Simplify, and that’s the beginning of progress
Complex moving averages, dazzling MACD, are just maps to help you "find direction"; but position management is the fuel and armor that determine how far you can go.
Even if you are a beginner in technical analysis, as long as you stick to these two iron rules:
Single-loss ≤ 2%
Total daily risk ≤ 6%
Persist long-term, and you will find that while others despair and get wiped out in a market crash, you not only sleep well but also calmly pick up the chips others have thrown away when the market falls into a golden pit.
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