Posted by Richard Kulisz on Oct 21, 2008; 5:16am
URL: https://forum.world.st/vwnc-Jun-or-FreeCAD-to-use-for-3D-stock-charting-tp1412459p1412460.html

> I'm thinking of 3D charts for stocks. Instead of 2D presentation of open
> high low close vol using candlesticks I'd prefer to use something like 3D
> cubes. Vol being the thickness of the cube, and high-low the height, while
> units in time as the width (normally only one unit, day, week or month
> though can be more). And the chart would better be able to deal real time
> changes in stock market, which means the shape of the last cube shifting or
> new cubes being added.

Your representation is misleading and will cause cognitive problems.
The viewers of your charts will see 3D objects and their brains will
assume that the volume, not the thickness, of your cubes are
meaningful. Many will interpret the volume to be the vol. It might be
better to have bars cast shadows.

So the height of the bar is the high-low, and the length of the shadow
is the vol. A bit bizarre to see non-proportional shadows but
unambiguous. This has the added advantage that it is easier to compare
the stock vols against each other since you can actually see the
'footprints' (which are aligned, unlike the tops) of each column.

Finally, if the price * vol is a quantity of interest to the users
then it's even worse because judging the volume of rectangular prisms
against each other is non-trivial.
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