在 fomo 上下永续合约订单，就是针对某个资产的价格会涨还是会跌开一个仓位。市价单会以当前可得的最佳价格立即成交。

你选择资产、方向、杠杆和数量，然后下单。订单会立刻开出你的仓位。App 会记住你上次使用的订单类型，所以下单前请确认显示的是「市价」。限价单和 TWAP 订单在 永续合约的订单类型：市价、限价与 TWAP 中有说明。

先选择你想交易的资产。可交易的市场包括 Hyperliquid 和 trade.xyz 上的所有市场。选择方向。认为价格会涨就做多，认为会跌就做空。

接下来设置杠杆。fomo 上的杠杆以整数选择（1x、2x、3x，以此类推），最大值因资产而异。杠杆那篇文章详细说明了它如何运作、如何影响你的风险。然后输入你想交易的金额。最小仓位是 15 USDC 名义价值。

下单页面会显示你的预估强平价格，也就是标记价格要到达哪个水平，协议就会关闭这个仓位。在手机上，点击详情一行可以看到预估成交价、手续费和已用保证金。在网页上，手续费和预估保证金在下单按钮下方。

没有单独的确认页面。在手机上，滑动「做多」或「做空」滑块即下单。在网页上，点击一次「做多」或「做空」按钮，订单就下出去了。

下单后，订单会以可得的最佳价格成交，仓位会出现在你的持仓中，并实时显示盈亏。

之后你可以监控仓位、设置止盈或止损、随时平仓，或者改为在目标价位平仓：点击「平仓」，把订单类型切换为「限价」，然后下限价平仓单。在逐仓仓位上，你还可以添加或减少保证金。

止盈和止损那篇文章说明了如何设置这些触发条件。每个市场页面的「关于」部分列出了它的标记价格、预言机价格、中间价、未平仓量和资金费率。

永续合约不向美国人士开放。访问永续合约，即表示你通过首次下永续合约订单时显示的声明勾选框确认，你不是美国人士，也不是从美国境内访问。

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