在 fomo 上下一筆永續合約交易，就是針對某個資產的價格會上漲還是下跌開立倉位。市價單會立即以最佳可用價格成交。

你選擇資產、方向、槓桿和數量，然後下單。訂單會立即開立你的倉位。App 會記住你上次使用的訂單類型，所以下單前請確認它顯示為「市價」。限價單和 TWAP 單在 永續合約的訂單類型：市價、限價與 TWAP 中說明。

先選擇你想交易的資產。可用的市場是 Hyperliquid 和 trade.xyz 上的每一個市場。選擇你的方向。如果你認為價格會上漲就做多，認為會下跌就做空。

接著設定你的槓桿。fomo 上的槓桿以整數選擇（1x、2x、3x，依此類推），最大值依資產而異。槓桿的文章會深入說明它如何運作，以及如何影響你的風險。然後輸入你想交易的金額。最小倉位規模是名目價值 15 USDC。

下單畫面會顯示你的預估強平價格，也就是標記價格必須到達、協議才會關閉倉位的水準。在手機上，點選詳情那一列可以看到預估成交價、手續費和已用保證金。在網頁上，手續費和預估保證金位於下單按鈕下方。

沒有另外的確認畫面。在手機上，你透過滑動「做多」或「做空」滑桿來下單。在網頁上，你點一次「做多」或「做空」按鈕，訂單就送出了。

下單後，訂單會以最佳可用價格成交，倉位會出現在你的持倉中，並即時顯示盈虧。

接下來你可以監控倉位、設定止盈或止損水準、隨時平倉，或改為以目標價格平倉：點選「平倉」，把訂單類型切換為「限價」，然後下限價平倉單。在逐倉倉位上，你也可以添加或減少保證金。

止盈和止損的文章會說明如何設定這些觸發條件。每個市場頁面的「關於」區塊會列出它的標記價格、預言機價格、中間價、未平倉量和資金費率。

永續合約不適用於美國人士。存取永續合約時，你透過第一次下永續合約單時顯示的聲明勾選框，確認你不是美國人士，也不是從美國境內存取。

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