linj vs log

pratas det ofta om, så här står det i Elliott Wave Principle, av Prechter / Frost:

The correct method for tracking the stock market is to use semilogartithmic chart paper, since the market's history is sensibly related only on a percentage basis. The investor is concerned with percentage basis. The investor is concerned with percentage gain or loss, not the number of points traveled in a market average. For instance, ten points in the DJIA in 1980 meant a one percent move. In the early 1920s, ten points meant a ten percent move, quite a bit more important. For ease of charting, however, we suggest using semilog scale only for long term plots, where the difference is especially noticeable. Arithmetic scale is quite acceptable for tracking hourly waves since a 40 point rally with the DJIA at 800 is not much different in percentage terms from a 40 point rally with the DJIA at 900. Thus, channeling techniques work acceptably well on arithmetic scale with shorter term moves.

mao det ena utesluter inte det andra, dock brukar jag vara konsekvent och alltid köra med log, det blir ju i stort sett ingen skillnad i korta sekvenser.

mvh