止损金额、仓位与杠杆：先分清风险预算
Risk budget vs position size: leverage is not your loss limit
风险预算是你设定的情景亏损金额，名义仓位是价格乘数量，保证金是持仓所需资金的一部分。三者不能互换。止损订单和计算器都不能保证最大亏损；先做模拟，不推荐风险比例或杠杆倍数。
A risk budget is your chosen scenario loss; notional position is price times quantity; margin is capital required to support the position. They are different. Neither a stop nor a calculator guarantees a maximum loss. Simulate first; no risk percentage or leverage is recommended.
从风险预算反推数量
数量 = 风险预算 ÷ 每单位情景亏损。线性模型中，每单位亏损为入场到假设退出价的价差加双边费用。多头止损低于入场，空头止损高于入场；不利滑点会扩大价差。
Derive quantity from a risk scenario
Quantity = risk budget / scenario loss per unit. In a linear model, unit loss is the adverse entry-to-exit move plus both trade fees. Long stops are below entry and short stops above; adverse slippage increases the move.
用完整模拟例子核对
预算100、入场100、止损95、每边费用0.1%、滑点0：每单位亏损5.195，数量约19.2493，名义仓位1924.93。2倍杠杆简化保证金约962.46；换成5倍只减少保证金，情景亏损仍是100。
Work through an example
Risk 100, entry 100, stop 95, fee 0.1% per side, zero slippage: loss per unit 5.195, quantity about 19.2493, notional 1924.93. Simplified margin at 2× is 962.46. At 5× margin falls but scenario loss remains 100.
结果不是可执行下单量
实际下单需按数量步长向下取整，并核对最小下单额、可用资金、保证金档位、资金费、强平和止损触发规则。工具不计算强平价，不覆盖反向合约、期权或跨币种抵押。
Output is not an executable order
Round quantity down to the allowed lot step. Check minimum orders, available capital, margin tiers, funding, liquidation and stop-trigger rules. The tool does not calculate liquidation price or support inverse contracts, options or cross-currency collateral.
为什么止损不保证风险上限
跳空、流动性不足、费用变化和先于止损发生的强平都可能扩大亏损。不要把“预算100”理解成最多损失100；还需考虑账户里其他仓位和相关风险。
Why a stop is not a loss cap
Gaps, illiquidity, changing costs and liquidation before the stop may increase loss. A budget of 100 does not mean a guaranteed maximum loss of 100. Other positions and correlated exposures matter too.
继续核对 / Next steps
无需提供密码、助记词或账户流水。No passwords, seed phrases or account records required.
参考 / Sources
官方教育与费用资料 / Official reference具体规则以对应产品和账户当前说明为准；示例非报价或投资建议。Product and account rules take precedence; examples are not quotes or investment advice.