Technical analysis and astrology work because life is not random. One wouldn't say that the hour hand pointing to the 5 on the clock caused rush hour, but one would be stupid to ignore the pattern because of it. Similarly with Mars transiting the 10th house or reaching a 9 / 13 sell in TD sequential.
I also sometimes wonder if TA works because other traders think it works and therefore obey the rules creating a self fulfilling pattern.