区域是一定的，具体点位要同时分析其他指标和股价形态分析、成交量等等情况后才能确定。
The area is fixed, in order to determine specific positions which we need to analyze with other indicators, stock price pattern, and volume and so on simultaneously.
另一方面，成交量以及波动率是期货交易所进行风险控制的重要指标，这方面的研究有助于提高风险管理水平。
On the other hand, trading volume and volatility are crucial index of risk control for future exchanges. Consequently the research in this area can help us improve the risk management.
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