A key metric for gauging interest besides actual volumes traded is the degree of open interest, or the number of derivative contracts that are not settled during a given trading period.

除了实际交易量外，另一个衡量利润的关键指标是未平仓的程度，或在一个给定的交易期间内未结算的衍生品合约的数量。

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More extended trading networks also helped develop Europe's economy in this period.

在这一时期，更广泛的贸易网络也促进了欧洲经济的发展。

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The online trading application then requests the user to confirm the buy order and enforces a timeout period for the user to confirm the order.

之后，在线交易应用程序需要用户确认购买订单，并且为用户强制设置确认订单超时时间。

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Sales jumped at the Argos catalogue shopping chain during the key Christmas and New Year trading period.

BBC: Christmas shops in search of sparkle

Shares in Northern Foods have tumbled after the firm said biscuit sales fell over the important Christmas trading period.

BBC: Northern's biscuit sales crumble

Caught by the turn, some have had their worst trading period in years.

ECONOMIST: Wall Street