干货！止损单的简介

Volcano

http://www.investopedia.com/terms/s/stop-lossorder.asp
DEFINITION OF 'STOP-LOSS ORDER'

An order placed with a broker to sell a security when it reaches a certain price. A stop-loss order is designed to limit an investor’s loss on a position in a security. Although most investors associate a stop-loss order only with a long position, it can also be used for a short position, in which case the security would be bought if it trades above a defined price. A stop-loss order takes the emotion out of trading decisions and can be especially handy when one is on vacation or cannot watch his/her position. However, execution is not guaranteed, particularly in situations where trading in the stock is halted or gaps down (or up) in price. Also known as a “stop order” or “stop-market order.”

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请看截图，每个证券商的版面不一定一样，简单来说，假如你有 XXX 的股票，计划$48 以下止血退场，应该下 STOP MARKET ORDER AT $48
有效时间 GOOD TIL CANCEL （GTC）
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STOP ORDER 的常用依据和注意事项1. 心理承受，负$X
2. 百分比，负N%
3. 图表的支撑线以下
4. 每天浮动的幅度以外
5. Unchecked Extended Trading Hours for stop orders
6. Use stop SELL when you are in long position，
    Use stop BUY when you are in short position.
7. 市场出现变化，记得要修改这个止损单。
8. 不要重复下单，如果下了两个止损单，有可能会变成空头
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以上仅为版主笔记和简单描述。不一定完整和全对，风险自负！！