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Online Trading (Securities)

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ALSO CALLED: Securities Trading, Trading (Securities), Online Retail Brokerages, Online Securities Trading
DEFINITION: OUCH is a digital communications protocol that allows customers of the NASDAQ (National Association of Securities Dealers Automated Quotations) to conduct business in the options market. With OUCH, subscribers can place, execute or cancel orders. OUCH allows subscribers to integrate NASDAQ into their proprietary networks. The earliest version of OUCH was developed in 1997. The protocol has been revised  … 
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ONLINE TRADING (SECURITIES) DEFINITION (continued): …  numerous times since then.OUCH is a low-level native protocol designed for high performance and minimal latency. In order to achieve optimum functional efficiency and speed, some flexibility is sacrificed. NASDAQ offers other protocols that are more developer-friendly but do not provide the degree of performance achievable with OUCH. The protocol works by passing logical messages of specific length between the host and the client application. All messages sent to the host can be retransmitted in the event of a temporary hardware failure or software error. By connecting a single OUCH account to … 
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