Technical analysis is field which attempts to study stocks on the stock market statistically, seeking to profit off of the patterns that are found there.
The theoretical value of a stock is the sum of all its future earnings, with earnings in the future discounted appropriately to account for the time value of money. Because these earnings are never fully predictable, traders may have different ideas about the true value of a stock, and buy the stock if they believe the currently offered prices are particularly low, or sell it when the prices are high.
Technical analysis, however, does not even attempt to understand the earnings of the stock, instead focusing on the shapes and patterns that result from traders making their these moves. While there is a human behavioral component to stock trading, it is not clear that one can extract much information from the shapes of stock charts. To the extent it does work, a substantial part of its success may be simply an artifact of the herd behavior of traders who engage in technical analysis, a zero-sum game.
The comic displays a stock price chart, annotated with labels which purport to be technical analysis. These labels are nonsense: "allegro" (a musical term), "lumbar support" (the thing in a chair shaped to better support your back), "bathtub". One label celebrates that "these two points define a line! Promising signal." (In Euclidian geometry, any two points define a line.)
The Tobin citation comes from James Tobin's Fred Hirsch Memorial Lecture "On the Efficiency of the Financial System" in 1984 .
The explanation says “allego” and “prologue“ are “musical terms such as may be used in the introduction of a performed piece”. That may be true of “prologue” but “allegro”, according to Wikipedia, is “a tempo marking indicate to play fast, quickly and bright”. 220.127.116.11 11:40, 21 January 2019 (UTC)
- And, derived from this, a movement of a piece that is performed quickly may be referred to as an allegro. It can also be used to refer to an entire piece, such as this piece by Mozart:  Kazzie (talk) 12:00, 21 January 2019 (UTC)
- But based on the placement of the allego and the way it is written it is most likely a tempo. Tempo goes just above the music and in this case it is the only word on the page that is italicized. 18.104.22.168 14:09, 21 January 2019 (UTC)
How would this compare with “candlestick patterns” - the bathtub one looks like a funny name for a pattern *meant* to signal that prices could rise https://www.investopedia.com/articles/trading/06/advcandlesticks.asp. 22.214.171.124 13:55, 21 January 2019 (UTC)
Random Walk might refer to https://en.wikipedia.org/wiki/Random_walk Curtobi4 (talk) 14:00, 21 January 2019 (UTC)
- https://en.wikipedia.org/wiki/Random_walk_hypothesis 126.96.36.199 16:33, 21 January 2019 (UTC)
- This is correct, also called Brownian Motion. The shape of these graphs is incredibly similar to that of the motion of a speck of dust floating in coffee. 188.8.131.52 03:26, 22 January 2019 (UTC)
Should we make a table for each term like there is for other comics? 184.108.40.206 18:01, 21 January 2019 (UTC)
- Yes please. Also, the individual jokes could be explained better. For instance, I'm pretty sure "lumbar support" is there as a joke on the word "spline" looking & sounding a lot like "spine". I'm 90% certain it's a pun, but that's not mentioned yet.
- ProphetZarquon (talk) 19:30, 21 January 2019 (UTC)
XKCD lessons with Randall: Today I learned that the word "Allegro" actually has a meaning, and isn't just a random website name. 220.127.116.11 19:27, 21 January 2019 (UTC)
The fundamental problem is that price movements are NOT a random walk. It is safe to assume that people who know a market well will study it, and make purchases/sells based on the underlying market drivers. And in doing so, they will leave "tells" in the pricing data. It becomes possible to look at markets, and see what the people in-the-know are doing, and follow along after them. That is the fundamental basis of technical analysis, and it works -- it works unbelievably well.
If there is a problem, it is that computers can do this pattern recognition so fast that there is longer any room for people to do this.
In other words, computerized arbitrage has gotten so good that people need not apply, and a few high-end groups with high speed electronic trading can get in before any person can.
Keybounce (talk) 00:31, 22 January 2019 (UTC)
- Keybounce, do you have any thoughts on how to share some of that with the layperson? The cryptocurrency markets are highly volatile and worth many billions of dollars. People with little resources are getting involved and either going bust or becoming millionaires. The trading history makes it clear there is a lot of automated trading for a long time, but I'm not sure many people really know what they are doing, and the publically available code appears pretty weak. There is a lot of opportunity here to make huge impacts on major economic and social groups in ways that could really help problems in the world. 18.104.22.168 03:32, 22 January 2019 (UTC)
True that computerized arbitrage/high frequency trading occurs at speeds which leave zero room for human reaction times (see the $$$ made by shaving only 3 milliseconds’ [!!] from the transmission delay, when Jim Barksdale built a new straight-path fiber optic line from Chicago Mercantile to NASDAQ in NJ in 2010, and by McKay and Tradeworx using microwave tower relays since then), but computerized arbitrage is, broadly, not the same as technical analysis of markets. Arbitrage takes immediate advantage of brief pricing trends and inefficiencies, while analysis seeks to predict pricing. Of course, technical analysis is also computerized at inhuman speeds, and its algorithms are used in arbitrage, but seems to me the comic isn’t about arbitrage, as such.Miamiclay (talk) 20:03, 22 January 2019 (UTC)
I'm disappointed that there wasn't a "WOW!" entry John.Adriaan (talk) 01:38, 24 January 2019 (UTC)
- I fixed your link, hope that's okay. 22.214.171.124 13:29, 24 January 2019 (UTC)
I always cringe when I see some trader (who probably don't have an economy degree) try to show with technical analysis that he could predict X happening over a year in advance. Just this day I saw it in my daily economy news. No, sorry to tell you this... if you couldn't predict X happening the day before you sure as hell couldn't predict it a year in advance. Conversely it doesn't make sense to apply fundamental analysis to stocks that you don't plan to keep for more than a year. That's not to say these methods are useless, they are useful for making educated guesses but all should be aware of their limitations. 126.96.36.199 19:30, 24 January 2019 (UTC)
Despite the comment on the social usefulness of global trading, I'd argue that it has largely replaced outright wars. So we now have a lot more people than the world needs. Though implying that global trade is inherently evil is at best just not very well informed. The market can to some degree fix global inequalities, but it also concentrates money on a few hands, which is the inevitable outcome if it is not regulated somehow. The problem here is you can't really regulate capitalism unless you do it globally. 188.8.131.52 20:23, 24 January 2019 (UTC)
- I'd argue that global trading has increased, not decreased, wars: roughly by creating the concentrated disparities of resources and power that you describe. 184.108.40.206 23:34, 24 January 2019 (UTC)
I think the Doldrums may refer to Norton Juster's novel, The Phantom Tollbooth. Early in the protagonist's adventure, he enters an area of the map called The Doldrums.