I really don't think you can call trading irrational. Its irrational if one is gambling, but nothing wrong with it.
The prediction behind trading is the statistics driving price action, visually represented in a chart. It is tried and true, just the same as investing is placing bets for the long term based on fundamentals of the underlying asset.
Its a misconception that charts don't work or are self fullfilling, they are a predictive tool and it's not black and white, its more like, if this: then that, else this.
Not only Charts work they work very very well !! You can see my daily Bitcoin chart !!
And they work because they are irrational, its in chaos that order emerges... but its not predictive but following and there is just money flowing if you follow it (without rationality)... just like an emotion of love its totally irrational but extremely satisfying :-)
I choose not to view charts as irrational lol -- its an equation thats all -- the people driving price are irrational. LOL
Great !
Of course its a choice and its good to know what you have chosen consciously :-)