And then music...
Victor Neiderhoffer, in a 2001 interview:
The market plays music all the time. The problem is you never know how the music of the market is going to end. But a good framework is that it will end on the tonic. Consonance to dissonance back to consonance. And whenever there's tremendous dissonance, strident moves in one direction, a good working hypothesis is that at the end, you'll find consonance again.
A 2007 New Yorker article on Neiderhoffer discussed some more of his music and markets ideas:
In “The Education of a Speculator,” he devotes an entire chapter to this notion, comparing the market’s movements to some of his favorite pieces of classical music, and juxtaposing pages of sheet music with stock charts. “When the markets are moving in my favor in a nice, gentle way—never below my initial price—I often think of the ‘Trout Quintet,’ ” he writes. “Another frequent work I hear in the market is Haydn’s Symphony No. 94. . . . Right after lunch, or before a holiday, the markets have a tendency to meander up and down in a five-point range above and below the opening. The pattern is similar to the twinkling C-major fifths of Haydn’s symphony.”
At some point, Neiderhoffer developed a means of "playing" audio of market moves for his trading desk. (I'll try to find a link to the source, its been a while since I saw it.
I have a colleague, that creates audio files of fractal market structures. He can play an entire day's tick by tick volatility. It just provides a different way to experience the data. Such things, like the things this great question has evoked from the community, may shift the way we think about things and keep us fresh.
If anyone wants to listen to some short clips, contact me by my email, posted in my profile, and I'll send a few.