1. 買賣單
在下單前，請您確認帳戶中的數位資產及新台幣餘額是否足夠支付下單金額及相關的其他費用。已成立的買賣單會被置於掛單簿中等待撮合。掛單簿中的買賣單採即時撮合模式，撮合原則為價格優先，以相似於股市交易中的五檔價量表形式。
所有類型買賣單都有掛單者（Maker）與吃單者（Taker）。掛單者的訂單會在掛單簿中等待撮合，吃單者則與既有訂單（即掛單者提供的訂單）進行撮合，因為兩者在交易中扮演的角色不同，現行市場上有些交易所會因此收取不同的手續費，但並非所有交易所皆如此。ACE為簡化用戶交易手續費計算，即採用單一手續費模式。
您可以下單任一形式的買賣單，目前ACE提供有限價單、市價單，未來將持續開發新的交易形式豐富用戶的交易選擇。
在您的買賣單成功撮合之前，您可以從「委託中訂單」列表中取消買賣單，市價單因為其撮合規則而不提供取消下單之功能（詳見 3. 市價單）；取消買賣單不會產生費用。
2. 限價單
限價單為限定價格的買賣單。依客戶指定之價格進行交易，成交價與客戶指定價間必須是買低賣高。當市場的流通性較低及交易價格劇烈變化時，限價單不保證可以被撮合。
撮合規則將先以委託的數量來成交限定價格或小於限定價格的買單，如果沒有這樣價格的訂單，或這樣價格的訂單數量不足，則產生一筆限定價格與數量（或剩餘數量）的訂單等待別人成交。
3. 市價單
市價單定義為「在交易所中以當下價格立即進行撮合之買賣單」。
市價單並不保證能在您預期的價格成交。市價單可能透過數個不同的價格完成撮合。此撮合過程會依據市價單的買賣數量及掛單簿中現有的買賣數量為準。
4. 撮合與訂單優先順序
ACE 交易所會將在掛單簿中 Taker 買賣單與 Maker 買賣單進行撮合，撮合優先順序為「價格優先，下單時間其次」。「價格-時間」順序的套用方式為，當一筆Taker 買賣單成立之後，便以掛單簿中「出價最佳者」優先，若出價最佳者不只一人，會依成立訂單的「時間順序」來進行撮合。
5. 交易費用
每筆登錄掛單簿上的訂單，ACE 交易所會酌收交易費用。費用會以百分比的方式依據訂單的買賣委託數量計算並自動從價款中扣除，相關手續費請參照費率說明。
6. 市場秩序
所有的交易及相關已付費用是無法退款，並且禁止以下市場行為：
- 因為交易規則中潛在或尚未發現的某種漏洞，而產生的不當得利
- 任一交易具有濫用平台之情事，例如：市場操弄
- 煽動、資助或支援任一以上之行為
- 以上其他未盡之情事，將依照 ACE 交易所專業團隊自主判斷
ACE Trading Guide
- Order
Before placing an order, please confirm whether the digital assets and the TWD balance in the account are sufficient to pay for the order and other related expenses. When the order is established, it will be placed on the order book waiting for the match. Our matching engine is based on price priority. The price display is similar to the five-price scale form in the stock market.
All types of purchase and sale orders have both Maker and Taker. Makers’ Order will be matched with Takers’ existing orders (pending order provided by maker) because the two play different roles in the transaction, so exchanges charge them with different fees.
You can place orders in any form. Currently ACE offers limit and market orders. In the future, ACE will continue to develop new trading forms to enrich users’ trading options.
Before your order is successfully matched, you may cancel the order from the “Open Order” list without paying any fee. According to “3. Market Order”, market orders do not provide the function of canceling. - Limit Order
The limit order is an order placed to execute a buy or sell transaction at a set number of trading pairs and at a specified limit price or better. When the market’s liquidity is low and transaction prices are changing drastically, the limit order made by the customer may not be a guaranteed match.
The priority of each is depended on the price and the quantity. If there is no such price, or the order quantity of such price is insufficient. Then this order will be on hold till there’s another transaction that matches. - Market Order
The market order is defined as a purchase order that is immediately matched with the currently available price on the exchange. Market orders will not guarantee the traded price and the market orders may be matched with several different prices. - Matching and Order Priority
ACE matches Takers’ orders with open Makers’ orders on each order book based on Price-Time Priority. Price-Time Priority means that each time a Takers’ order is posted, the Takers’ order is matched with the best price on the order book on a First-In-time basis. - Trading Fees
ACE charges a fee for each order that is posted to the order book. The fee is calculated as a percentage of the Order quantity and will automatically be deducted. Please refer to Fees and Rates for current fees. - Market Integrity
All transactions and paid fees are not refundable and the following behaviors are prohibited:
- Trading behavior indicative of an intent to exploit known / unknown platform vulnerabilities.
- Any transactions executed with the intent of market manipulation.
- Enabling, financing, supporting or endorsing any actions of the above.
- ACE Exchange reserves the right to modify or extend the applicable rules at its discretion.