Once professional brokers got in on the act, though, the nature of exchanges began to shift. Buyers and sellers lost some of their close contact with markets.
自从专业经纪人介入到交易中，交易的性质即开始发生变化：买主及卖主丧失了与市场的一些联系；交易变得越来越复杂，比如说可以以当前价格买卖将来的货物。
Online brokers should offer immediate or scheduled trades, including the ability to purchase at the start of trading, when the markets close and even after hours.
互联网券商应该提供即时的和有计划的交易，包括在建仓时能迅速买进，在闭市时也能执行策略等。
Online brokers should offer immediate or scheduled trades, including the ability to purchase at the start of trading, when the markets close and even after hours.
互联网券商应该提供即时的和有计划的交易，包括在建仓时能迅速买进，在闭市时也能执行策略等。
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