[mhh__]

Having used and witnessed some of the upbringing of these markers I highly recommend their use where applicable.

Quantitative work — finance being the obvious but not unique example — often suffer intensely from data-clutter, sometimes to the point of paralysis.

A visual approach is a great solution, this however requires some design, taste, and some "fat tony" intuition (I think programmers often aren't as good as they think they are at charting because the data is just a number to them) — one should take the time to design some beautiful, simple conventions & symbols; that's exactly what these are.

To quote Marco Pierre White: Genius is knowing how to let things be simple.