Disagree with that, You don’t need machine learning and you don’t need high frequency trading. You can’t beat high frequency trading bots over ultra short time periods, but you don’t need to and shouldn’t try. Technical analysis works on all time frames
Charts have information about how market participants reacted to a situation. They are a map of human behaviour in the past. Humans tend to react in similar ways to similar situations. You don’t use technical analysis to predict the future, you use it to analyse the past, and how market participants behave in similar situations in the past.