為何倉位大小比策略更重要
The 1% risk rule is the gold standard for beginner traders: never risk more than 1% of your total account on a single trade. For a $1,000 account, that means your maximum loss per trade should be capped at $10. It may sound small, but this rule is what keeps you in the game long enough to actually learn and improve.
Here's the core formula every trader needs to memorize: <strong class="text-foreground">Position Size = (Account Size × Risk %) ÷ Stop-Loss %</strong>. For example, if you have a $1,000 account, risk 1%, and set a 5% stop-loss on a trade, your position size should be: ($1,000 × 1%) ÷ 5% = <strong class="text-foreground">$200</strong>. You're only deploying $200 of capital, so even if the trade hits your stop-loss, you lose exactly $10.
The core principle: your goal isn't to maximise gains on a single trade, but to protect your capital so you can keep trading over the long term.
1% 法則(風險管理黃金準則)
Why does position sizing matter so much for a small account? Consider this: if you risk 20% per trade and hit just 5 losing trades in a row — which is completely normal even for experienced traders — you've wiped out over 67% of your account. At 1% risk, those same 5 losses only cost you about $49, leaving you with $951 and plenty of room to keep trading.
帳戶規模
$1,000
<strong class="text-foreground">Scalp Trading</strong>
$10
<strong class="text-foreground">Day Trading</strong>
$20
Swing Trading
Typical Stop-Loss Distance
倉位大小公式
以下是專業交易者使用的公式:
Position Size = (Account Balance × Risk %) ÷ Stop-Loss Distance %
Or equivalently: Dollar Risk ÷ Stop-Loss Distance = Position Size
讓我們用一個具體例子來說明:
| 帳戶餘額 | $1,000 |
| 0.5% – 1.5% | $10 |
| 止損距離 | 5% |
| 2% – 5% | $200 |
| 5% – 15% | $40 |
💡 Use our calculator Recommended Position Size (1% rule) 倉位規模計算器 $667 – $200
$1,000 帳戶的實際案例
$500 – $200
| Stop-Loss | 倉位規模 | $200 – $67 | 交易風格 |
|---|---|---|---|
| 2% | $500 | $167 margin | Max dollar risk per trade stays fixed at $10 (1% of $1,000) regardless of trading style — only the position size and stop distance change. |
| 5% | $200 | $67 margin | Day trading involves opening and closing positions within the same day to capitalize on short-term price movements, requiring active monitoring and a disciplined risk management approach. |
| 10% | $100 | $33 margin | Swing trading aims to capture price swings over several days or weeks, striking a balance between short-term agility and the deeper analysis typical of longer-term investing. |
| 20% | $50 | $17 margin | 長期持有 |
<strong class="text-foreground">Leverage</strong> is a double-edged sword that amplifies both your gains and your losses. With 10× leverage, a 1% move against you becomes a <strong class="text-foreground">10% loss on your margin</strong>. For a $1,000 account, using high leverage without adjusting your position size is one of the fastest ways to get liquidated. If you use leverage, you must proportionally reduce your position size to keep your dollar risk at $10.
小額帳戶 Leverage 使用準則
Here's how leverage affects your safe position size while keeping risk fixed at $10 on a trade with a <strong class="text-foreground">2% stop-loss</strong>: at 1× leverage, your position size is $500; at 5× leverage, it drops to $100; at 10× leverage, it drops to just $50. The higher the leverage, the smaller the position you should open — <strong class="text-foreground">leverage does not change your risk tolerance, only your exposure</strong>.
2x–3x
推薦
For beginners, we recommend <strong class="text-foreground">avoiding leverage entirely</strong> until you have at least 3–6 months of profitable spot trading experience. If you do use leverage, cap it at <strong class="text-foreground">2× or 3× maximum</strong> for a small account. Exchanges like Binance may offer up to 125× leverage, but high leverage is not a feature — it's a risk multiplier that professionals use with extreme caution.
5x
適中
Your <strong class="text-foreground">stop-loss placement</strong> directly determines your position size, so it should never be chosen randomly. A well-placed stop-loss sits just below a key support level (for long trades) or above a key resistance level (for short trades). Tight stops without technical justification will get triggered by normal market noise — and then you'll re-enter at a worse price, compounding your losses.
10x+
避免
Another concept that supercharges your position sizing strategy is the <strong class="text-foreground">risk-to-reward ratio (R:R)</strong>. You should only take trades where your potential profit is at least <strong class="text-foreground">2× your potential loss</strong>. For example, if you risk $10 (1% of $1,000), your target profit should be at least $20. Over many trades, a 2:1 R:R means you can be wrong 40% of the time and still be profitable.
One of the most common mistakes beginners make is <strong class="text-foreground">"revenge trading"</strong> — increasing their position size after a loss to try to win back money quickly. This is emotionally driven behavior that violates every rule of position sizing. If you lose $10 on a trade, your next trade should still risk only $10. Stick to the formula, not your feelings. 過度使用 Leverage 指南As your account grows, your position sizes should grow proportionally — not in fixed dollar amounts. If your account reaches <strong class="text-foreground">$1,500</strong> thanks to consistent gains, your 1% risk is now $15, not $10. This is called <strong class="text-foreground">dynamic position sizing</strong>, and it's how small accounts compound into large ones over time without ever taking on disproportionate risk.
毀滅數學:小額虧損如何複利累積
It's also important to think about <strong class="text-foreground">total portfolio exposure</strong>, not just per-trade risk. Even if each trade risks only 1%, having 10 open positions simultaneously means 10% of your account is at risk at once. For a $1,000 account, consider limiting yourself to <strong class="text-foreground">3–5 open trades at a time</strong> to keep total exposure manageable and avoid correlation risk (multiple coins dropping together).
| Here's a quick real-world example tying it all together: You spot a potential long trade on Bitcoin (BTC). Your account is $1,000. You identify support at $60,000 and place your stop-loss at $59,400 — that's a <strong class="text-foreground">1% stop-loss distance</strong>. Using the formula: ($1,000 × 1%) ÷ 1% = $1,000 position size. You buy $1,000 worth of BTC spot, no leverage. If BTC drops to $59,400, you exit and lose exactly $10. Clean, controlled, and sustainable. | 剩餘 | 回本所需漲幅 |
|---|---|---|
| 10% ($100) | $900 | 11.1% |
| 25% ($250) | $750 | 33.3% |
| 50% ($500) | $500 | 100% |
| 75% ($750) | $250 | 300% |
Position sizing won't make every trade a winner, but it will ensure that no single trade can destroy your account. The traders who grow $1,000 into $10,000 aren't the ones who took the biggest risks — they're the ones who took the right-sized risks, consistently, over hundreds of trades. Master position sizing first, and everything else in trading becomes much easier to manage.
結論: Ready to put this into practice? Use our <strong class="text-foreground">free position size calculator</strong> above to instantly compute the right trade size for your account, stop-loss distance, and risk tolerance — no math required.
相關工具與指南
Calculate your exact trade size
Complete beginner's guide
Comprehensive risk strategies
Find your liquidation price
Evaluate trade setups
Understand margin call warnings
Step-by-step liquidation formulas
常見問題
在 $1,000 的帳戶中,每筆交易應承擔多少風險?+
我可以在 $1,000 的帳戶中使用 leverage 嗎?+
我能虧損多少次交易才會爆倉?+
在小額帳戶中應使用逐倉還是全倉 margin?+
持有 $1,000 帳戶時,最適合交易的加密貨幣是什麼?+
如何計算帶有 stop-loss 的倉位規模?+
衍生品及槓桿產品——重要風險警告
衍生品是複雜的金融工具,具有資金迅速損失的高風險。槓桿交易(futures、perpetual 合約、保證金交易、options)可能導致超出初始投資的虧損。大多數散戶投資者帳戶在交易衍生品時都會虧損。
你應仔細考量自己是否了解衍生品的運作方式,以及是否能夠承擔損失資金的高風險。本內容僅供教育目的,不構成財務建議、投資建議,或交易衍生品的推薦。
在歐盟,加密貨幣衍生品依 MiFID II 被歸類為金融工具。只有獲得適當 MiFID II 授權的平台,才能向歐盟居民提供這類產品。各司法管轄區的監管處理方式有所不同——在參與交易前,請先確認衍生品交易在你所在國家的法律地位。