什么是主图与副图？

中文

在股票、期货等金融交易领域，主图和副图是常用的技术分析图表，它们帮助投资者更直观地了解市场的走势和变化。

主图通常指的是K线图，也称为蜡烛图或阴阳图。K线图以每个交易时间单位（如日、周、月等）的开盘价、收盘价、最高价和最低价为基础，绘制出柱状图形。柱状的上影线表示最高价与收盘价之间的差距，下影线表示最低价与开盘价之间的差距，而柱状实体则反映了开盘价与收盘价之间的关系。K线图能够直观地展示价格走势、波动幅度以及多空力量的对比，是投资者进行技术分析的重要工具。

副图则是指在主图下方附加的图表或指标，用于辅助分析市场趋势和价格动向。常见的副图包括移动平均线、相对强弱指数（RSI）、随机指标（KDJ）等。这些指标通过对价格数据的计算和统计，提取出市场的一些内在规律和趋势特征，帮助投资者更好地把握市场的走势和节奏。

在进行股票、期货等金融交易时，投资者需要综合考虑主图和副图的信息，结合自身的交易策略和风险控制方法，做出更为明智的投资决策。

英文

In the financial trading fields of stocks, futures, and the like, the main chart and the sub-chart are commonly used technical analysis charts that help investors gain a more intuitive understanding of market trends and changes.

The main chart typically refers to the K-line chart, also known as the candlestick chart or yin-yang chart. The K-line chart is based on the opening price, closing price, highest price, and lowest price of each trading time unit (such as daily, weekly, monthly, etc.) and draws a columnar graph. The upper shadow of the column represents the gap between the highest price and the closing price, while the lower shadow represents the gap between the lowest price and the opening price. The column entity reflects the relationship between the opening price and the closing price. The K-line chart visually displays price trends, volatility, and the contrast between bullish and bearish forces, making it an important tool for investors to conduct technical analysis.

The sub-chart, on the other hand, refers to additional charts or indicators attached below the main chart to assist in analyzing market trends and price movements. Common sub-charts include moving averages, the Relative Strength Index (RSI), the Stochastic Oscillator (KDJ), among others. These indicators extract some inherent laws and trend characteristics of the market through the calculation and statistics of price data, helping investors better grasp market trends and rhythms.

When trading stocks, futures, or other financial instruments, investors need to comprehensively consider the information from both the main chart and the sub-chart, combining their own trading strategies and risk control methods to make more informed investment decisions.