比如说，一个看涨期权，可以让持有者有权在一段特定的时间内以一个特定的价格买入一个资产。

A call option, for example, gives the holder the right to buy an asset at a specified price within a specified period.

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由买入一个期货合同和买入一个看跌期权的组合，就叫做组合买入看涨。

A combination of a long futures contract and a long put, called a synthetic long call.

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看涨行情结束标志一个新的上升趋势和买入点的出现。

That bullish close signals a new uptrend and long entry.

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