eusdaiki, I agree with your word of caution, but there could be free lunches:Quote from alesanti:
What I don't understand is why people think that polarized way: predicting the markets is impossible because "there is no free lunch" or there is no "holy grail". In science, whenever you measure something you have to express the error that must always accompany the measurement. Analogously, if you say "I predict the price", surely you are not telling exactly the price, but the price within some error. Error that could vary in time.
The only way to show results in market prediction is to express some average degree of accuracy.
That level of accuracy should be enough to generate profitable trades systematically.
It may be impossible predict prices precisely, but it is not impossible predict prices profitably.
To ilustrate my point, this prediction, computed today at
9:30 ET
Is far from perfect. Anyway it generated 2 trades:
SP500
Date Type Target Gain Entry Time Exit Time Entry Value Exit Value P&L Cumm. P&L
07/27/2006 Long 5.64 10:15 11:35 1272.24 1273.25 1.01 1.01
07/27/2006 Short 6.19 11:35 15:15 1273.25 1264.05 9.20 10.21
That yield 10.21 points of the S&P500 in the day. In E-Minis terms: 500 dollars per contract, or a max of about 10% in the day.
