Trailing Stop Order指追踪止损订单。

追踪止损也可以称为移动止损，跟踪对交易者有利的价格变动方向，维持止损价格和现价之间的初始价差。它追随最新价格设置一定点数的止损，只要价格在按照盈利的方向波动，那么订单一直有效，一旦价格反转一定程度，那么止损就会触发并平仓。追踪止损是一个非常好的交易工具，尤其在价格波动大的情况下，可以保证盈利。A trailing stop order is a conditional order that uses a trailing amount, rather than a specifically stated stop price, to determine when to submit a market order. The trailing amount, designated in either points or percentages, then follows (or "trails") a stock's price as it moves up (for sell orders) or down (for buy orders).

GTC全称Good Till Cancelled，GTC Order指撤销前有效订单。

撤销前有效订单是指在交易者决定取消该订单之前，该订单将在市场上一直有效。外汇经纪商在任何时候都不能取消这一订单。A Good-Til-Cancelled (GTC) order is an order to buy or sell a stock that lasts until the order is completed or canceled. Brokerage firms typically limit the length of time an investor can leave a GTC order open. This time frame may vary from broker to broker.

OCO全称One-Cancels-the-Other，OCO Order指选择性委托订单。

选择性委托订单是将止损订单和获利订单捆绑在一起，以保证这两种订单中的一种被执行时，另一种将自动作废。A one-cancels-the-other (OCO) order is a pair of conditional orders stipulating that if one order executes, then the other order is automatically canceled. An OCO order often combines a stop order with a limit order on an automated trading platform.

以下为相关双语示例，供参考：

During forex trading hours customers can place orders through out the day and additionally use the features incorporated in our platform to support limit, stop and trailing stop orders. forex-swiss.com

在外汇交易期间，客户每天都可以下订单，还可以使用我们平台内嵌的功能设置限价 、止损和追踪止损订单。

For example, a customer bought 1 lot of LLG at USD 1660.00/oz and places an OCO order to square the position at USD1 655.00/oz as a Sell Stop Order and a Sell Limit Order at USD 1680.00/oz for profit taking. wfgold.com

例如：客户于 1660.00美元 /盎司买入伦敦金，并留下 OCO挂单，于 1655.00美元 /盎司设定一卖出停损单止损，且于 1680.00美元 /盎司设定一卖出限价单获利，当其中之一个委托挂单成交后，另一委托挂单则自动取消。