They could either go with technical or fundamentals but this would really be on situational manner because not all would really be that knowledgeable with TA or even realizing or studying FA's

but it isnt bad to have both and acquiring both knowledge too because it would really be helpful but to consider that not all the times we are seeing news or events in the market thats the time
that people would stick out with technical analysis even though its not precise but its better rather than on making out some trades without any basis.