Not so linear, you can invest based on charts, using long term charts(years).
T/A and fundamentals are just two different ways to analyze a stock, but, in my opinion, charts are much better, because fundamentals can be cooked, and, charts not, because they precede news, and, even with good fundamentals, the chart will say the truth.
Of course I admit that possibly 80% - 90% of people that uses charts, do not know what they are talking about, I already saw lots of aberrations, like people calling a resistance support, and, vice-versa.