【中文版】

二元期权是一种金融衍生品，其交易过程中常会参考K线图。那么，二元期权使用的是哪种K线呢？

在金融市场中，K线图是一种常用的技术分析工具，用于记录股票、期货等交易品种的价格波动情况。二元期权同样使用K线图来分析市场行情，不过它采用的是美国线（American Style）或欧式期权（European Style）的K线图。

美国线K线图是一种连续记录的K线形态，它能够反映股票或其他交易品种在某个时间段内的开盘价、收盘价、最高价和最低价。这种K线图具有较高的参考价值，能够较为全面地展示市场的多空双方力量对比情况。

欧式期权K线图则更多地关注期权本身的行权价变化。在欧式期权中，只有当期权到期时才能行权，因此欧式期权K线图主要反映的是期权行权价的变化情况。这种K线图对于分析期权的内在价值较为有用。

总体来说，二元期权使用的K线图与常规的股票、期货等交易品种的K线图类似，但更侧重于期权本身的特点。投资者在参与二元期权交易时，需要关注相应的市场行情，并学会使用K线图等工具进行技术分析。

【英文版】

Binary options is a financial derivative that often refers to K-line in its trading process. So, what kind of K-line does binary options use?

In the financial market, K-line is a commonly used technical analysis tool to record the price fluctuations of stocks, futures and other trading varieties. Binary options also use K-line to analyze the market conditions, which adopts American Style or European Style K-line.

American Style K-line is a continuous record of the K-line pattern, which can reflect the opening price, closing price, highest price and lowest price of a stock or other trading varieties in a certain time period. This K-line pattern has high reference value and can display the force comparison between the market bulls and bears in a more comprehensive way.

European Style K-line focuses more on the change of the option's strike price. In European options, the option can only be exercised when it expires, so European Style K-line mainly reflects the change of the option's strike price. This K-line is more useful for analyzing the intrinsic value of the option.

Overall, binary options use similar K-line to regular stocks, futures and other trading varieties, but focus more on the characteristics of options themselves. When investors participate in binary options trading, they need to pay attention to the corresponding market conditions and learn to use tools like K-line for technical analysis.