Totally depends on my situation. If im playing the long game and not monitoring my trades as much i'll place a SL. If im scalping and at my computer/phone i'll use my own judgment.

Do you use stoploss?

I've learned to keep calm, don't try and get emotions involved. When I first started trading I panicked every time I took a loss or went into drawdown, that panic caused mistakes and they ultimately lost me money. I think of it like a football game ...

What have you learned?

It may be a basic indicator but ATR based stop loss has always worked alright for me. Typically use Price +/- ATR * 3/5

Scalping with quick SL measurement to calculate lot size?