成交量在确认价格走势方面有很大的作用。如果将成交量单独的在图表下方体现的话，那么你将很难确认它和价格之间的关系。等成交量图将价格与交易量整合在一幅图表上，克服了这一缺陷。

等成交量图由Richard W Arms Jr.开发，并详细介绍在他的《股票市场成交量循环》一书中。

矩形的高度代表交易范围——价格的最高点和最低点，而宽度则表示该时段内的交易量。我们可以从矩形的形状上得出许多信息：

扁长的矩形表示买卖双方成交量巨大，如果出现在强劲的上升趋势之后，则是一个很强的趋势反转信号。宽大的矩形则说明，上升趋势中买方力量强劲或者是下降趋势中卖方力量强劲，它可以用作突价格破阻力位后趋势形态的确认。

收盘价

收盘价在等成交量图中体现为一条水平线。收盘价相对于日内交易范围的位置显示出买方还是卖方占据主导地位。

在一个上升趋势中：
• 位于矩形上方的收盘价说明买方占据主导；
• 接近于矩形下方的收盘价表明卖方取得主导地位。
在一个下降趋势中：
• 收盘价接近于日交易低点，说明卖方仍然占据主导；
• 收盘价接近日交易高点，说明买方力量战胜卖方。 

那么体现出收盘价有什么作用？
关键是，我们把收盘价的上半部分或者下半部分用阴影表现出来，来反映当日的收盘价与昨日的收盘价关系。这可以让你一眼就可以识别出趋势的强弱。

如果矩形的阴影部分减少，说明趋势正在减弱。
• 如果当日的收盘价高于昨日，那么条形图的阴影部分是蓝色或者绿色
• 收盘价的下方比上方颜色深。
• 如果收盘价比昨日低，那么阴影部分为红色。
收盘价的上方比下方颜色深。
所以，收盘价总是在蓝色阴影的上方或者是红色阴影的下方（下降趋势中）。这听起来很复杂，但是你可以从下图中很容易的分辨出：
 
• 从第二和第三条矩形中，你可以看出趋势正在减弱——它们大部分都是浅颜色。
• 在第四条矩形图中，最高点和收盘价都在降低——表明趋势不确定。
• 第五条矩形表明下降趋势开始，并得到第六条矩形的验证。

Equivolume
Volume plays an important role in confirming price movements. It is sometimes difficult to track this relationship on a normal bar chart with volume plotted in a separate slot below. This is overcome by plotting price and volume activity on a single chart.
Equivolume was invented by Richard W Arms Jr. and introduced in his book Volume Cycles in the Stock Market.
The height of each bar (or box) represents the trading range for the period - the highest and lowest prices recorded - while the width of the bar represents volume traded during the period.
We can tell a great deal about the commitment of buyers and sellers from the shape of the box.
An oversquare day shows that buyers and sellers are both strongly committed to their positions. This is a powerful reversal signal after a strong trend. Power days show strong commitment by buyers in an up-trend (or sellers in a down-trend) and serve as confirmation of breakouts above resistance levels (or below support levels) in a chart pattern.
Closing Prices
Incredible Charts have added closing prices to Equivolume charts. The position of closing price in relation to the day's range indicates whether buyers or sellers have control.
In an up-trend:
• A close near to the day's high indicates that buyers have retained control
• Close near the day's low shows that sellers have taken control.
In a down-trend:
• Close near to the day's low indicates that sellers are still incontrol
• Close near to the day's high shows that buyers outweigh sellers.
Closing price is represented by a horizontal line across the bar.
So what's the big deal?
The key is that we have shaded the area above or below the closing price, depending on whether the close is higher or lower than the previous day. This enables you to tell at a glance whether a trend is strong or weakening.
Bars that are mostly lighter shade signal that a trend is weakening.
• If closing price is higher than yesterday's close, the bar will be colored blue/green.
The area below closing price is shaded darker than the area above the close.
• If closing price is lower than the previous close, the bar is colored red.
The area above closing price is shaded darker than the area below the close.
So closing price is always the top border of the blue shaded area (green is used on some charts) or the bottom border of the red shaded area (in a down-trend). It sounds complicated but is easy to follow on the chart. Take a look at the figure below.
• You can see the trend weakening on the 2nd and 3rd bars - they are mostly lighter shade.
• On the 4th bar there is a lower high and the close is lower - signs that the trend is uncertain.
• The 5th bar signals the start of a down trend and is confirmed by the 6th bar.

文章翻译由兄弟财经提供

本文来源：http://www.incrediblecharts.com/technical/equivolume.php