成交量在確認價格走勢方面有很大的作用。如果將成交量單獨的在圖表下方體現的話，那麼你將很難確認它和價格之間的關系。等成交量圖將價格與交易量整合在一幅圖表上，克服了這一缺陷。
等成交量圖由Richard W Arms Jr.開發，並詳細介紹在他的《股票市場成交量循環》一書中。
矩形的高度代表交易範圍——價格的最高點和最低點，而寬度則表示該時段内的交易量。我們可以從矩形的形狀上得出許多信息：
扁長的矩形表示買賣雙方成交量巨大，如果出現在強勁的上升趨勢之後，則是一個很強的趨勢反轉信號。寬大的矩形則說明，上升趨勢中買方力量強勁或者是下降趨勢中賣方力量強勁，它可以用作突價格破阻力位後趨勢形態的確認。
收盤價
收盤價在等成交量圖中體現為一條水平線。收盤價相對於日内交易範圍的位置顯示出買方還是賣方占據主導地位。
在一個上升趨勢中：
• 位於矩形上方的收盤價說明買方占據主導；
• 接近於矩形下方的收盤價表明賣方取得主導地位。
在一個下降趨勢中：
• 收盤價接近於日交易低點，說明賣方仍然占據主導；
• 收盤價接近日交易高點，說明買方力量戰勝賣方。
那麼體現出收盤價有什麼作用？
關鍵是，我們把收盤價的上半部分或者下半部分用陰影表現出來，來反映當日的收盤價與昨日的收盤價關系。這可以讓你一眼就可以識別出趨勢的強弱。
如果矩形的陰影部分減少，說明趨勢正在減弱。
• 如果當日的收盤價高於昨日，那麼條形圖的陰影部分是藍色或者綠色
• 收盤價的下方比上方顔色深。
• 如果收盤價比昨日低，那麼陰影部分為紅色。
收盤價的上方比下方顔色深。
所以，收盤價總是在藍色陰影的上方或者是紅色陰影的下方（下降趨勢中）。這聽起來很複雜，但是你可以從下圖中很容易的分辨出：
• 從第二和第三條矩形中，你可以看出趨勢正在減弱——它們大部分都是淺顔色。
• 在第四條矩形圖中，最高點和收盤價都在降低——表明趨勢不確定。
• 第五條矩形表明下降趨勢開始，並得到第六條矩形的驗證。
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.
文章翻譯由兄弟財經提供
本文來源：http://www.incrediblecharts.com/technical/equivolume.php