What’re some confirmations you use to predict whether a trend will continue or reverse soon?

As the title says. This is the first time i’ve taken trading seriously, and although my win to loss ratio is decent and my account is doing good, I feel like I could let my winning trades run for longer than I do. Multiple times now i’ve sold 70-100% trades that ended up going for 300-400%, and it is due to me fearing of a reversal. What’re some indicators or types of candles you look for in regard to a continuing trend or an upcoming reversal? even some tips/advice would be appreciated. tia!