it depends on your style. the right short anwser would be use both.
Me personally only use technical analysis. I don’t like fundamental but i heard fundamental analysis is very important especially on lower timeframe. I found a way to “ignore” that and I only trade off technical anaylsis and it works for me. I don’t trade any pair who has any major fundmental report upcoming that day. This is my only fundamental analyisis which I take in account. but as i said, it depends on your trading style, maybe TF too