Here's part two in our Financials Charts Explained series, all of which will be available in Wijmo FinancialChart (due for release July 16). Our previous blog covered Heikin-Ashi and Renko; in this one we'll be covering EquiVolume and Column Volume Charts.
Chart #3: EquiVolume
EquiVolume charts are similar to candlestick charts, but the candlesticks are replaced with rectangular boxes of varying width (with no wicks). Rather than open/close components, an EquiVolume box includes high and low price components, and adds a third dimension in the width of the box: volume, which in the example below represents total shares traded in a day. Color represents whether the close number is higher or lower than the previous box's close. In the example below, you can see where price trended up, where it fell, and even—in the case of October 29-30, 2014—see that far more shares were traded in the day after a sudden drop. 
Read more about EquiVolume charts at StockCharts.com, a terrific resource for financial analysts and developers.
Chart #4: Column Volume
Column Volumes are often used as a secondary supporting chart for EquiVolume and others. Like EquiVolume, volume is expressed in the width of the column; unlike EquiVolume, it's more bar chart than candlestick. In the example below, the width of the column (i.e., shares traded in a day) makes it easy to see that far more shares were traded in October than in November, an analysis that aligns with the data we saw in the EquiVolume chart above. 
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