How were you convinced that Technical Analysis works?

[Fox]

First off, I must state that I have not used TA for trading decisions and my knowledge of TA is close to zero. In other words, I have no strong views either way about the validity or effectiveness of TA.

Trawling through forums, I have found intelligent voices I respect, who subscribe to TA. This has piqued my curiosity about TA. I am still happy with non-directional trading, but it is always a plus to be open minded and to learn.

My question is this:
What was the single most significant argument that convinced you that TA is an effective direction forecasting tool?
 

[Grinder]

Still yet to be convinced. Figure you can let yourself be convinced of anything if you want to believe, much prefer to use TA indicators as a way of forming an hypothesis but do not put any faith in it or my hard earned.

[Condors]

Still yet to be convinced. Figure you can let yourself be convinced of anything if you want to believe, much prefer to use TA indicators as a way of forming an hypothesis but do not put any faith in it or my hard earned.

I like the "hypothesis" hypothesis.

I don't ascribe any predictive value at all to TA. It's a coin toss. But it does allow you to create a hypothesis with boundaries telling you whether your hypothesis is right or wrong.