ECN 和 floor trader 有什么区别?ECN 有没有可能替代floor trader

题目

ECN 和 floor trader 有什么区别?ECN 有没有可能替代floor trader
好的话给加分..
不是说NYSE采用的是floor trader而NASDAQ采用的是ECN呢.为什么还会出现以下不同...
1. The broker sends a buy order to a specialist on the exchange floor.
2. The specialist looks for sellers on the trading floor or in an electronic order book.
3. If the specialist finds enough sellers to match the offer price, the specialist completes the transaction.
Here are the steps for buying stock on the NASDAQ:
1. The broker consults a trading screen that lists how many shares various market makers are offering to sell and at what price.
2. The broker picks the best price and sends an electronic message to the market maker, who must sell the shares.
In contrast, buying stock on an ECN involves these steps:
1. The broker sends a buy order to an ECN.
2. The computer looks for matching sell orders on the ECN.
3. If the computer finds enough sellers to complete the trade, the transaction is executed. Otherwise, the order isn

答案

ecn 和 floor trader 根本不搭界.ecn是一种交易机制,直接入场,源自股票证券交易相对应的是做市商交易机制.floor trader 是场内交易,对应的是otc 场外交易.
你说怎么取代?