Institutional position sizing, prop firm 1% risk rules, futures liquidation modeling, and spot PnL projection.
To calculate the exact number of contracts or coins to purchase without violating your risk budget:
Never size your position by "gut feeling" or arbitrary leverage multipliers. Fix your dollar risk first, then let the formula determine the position size.
Isolated leverage liquidation price is determined by the maintenance margin requirement (MMR):
At 10x leverage, your position will be liquidated if price drops ~9.5%. At 50x, a mere 1.8% drop triggers total loss of initial margin.
华尔街机构级数学计算套件，实时计算加密货币盈亏比例、定投复利增值、币安/Bybit/OKX合约爆仓强平价以及保本手续费点位。
净利润计算公式：净盈亏 = (平仓价 - 开仓价) x 持仓数量 - 交易总手续费 - 累计资金费率。定投（DCA）通过调和均值数学原理在熊市低吸，显著降低平均持仓成本。
| Calculation Metric | Mathematical Formula | Application | Institutional Benchmark |
|---|---|---|---|
| Net Profit (PnL) | Size × (Exit - Entry) - Total Fees | Spot & Futures Accounting | Maker (0.02%) / Taker (0.05%) |
| DCA Weighted Avg | Sum(Investments) / Sum(Coins) | Volatility Smoothing | Weekly / Monthly Periodic Schedule |
| Isolated Liq Price | Entry ± (Margin / Size) + MMR | Capital Preservation | Exchange Tier MMR Scale |
| Prop Max Drawdown | (Peak - Current) / Peak ≤ 5% - 10% | Evaluation Account Sizing | Strict Trailing / EOD Drawdown |
净利润 = (平仓价 - 开仓价) * 数量 - (开仓费 + 平仓费 + 累计资金费用)。在杠杆交易中，收益乘以名义持仓量而非保证金本金。
定投利用调和均值在下跌趋势中自动积累更多低价筹码，极大平滑买入均价并降低心理压力。
逐仓仅损失该单独立分配的保证金，而全仓会将整个账户余额共同抵押，一旦发生极端黑天鹅可能导致全账户清零。
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