"Positions established must be reduced and removed until or unless the market proves the position correct" - Phantom of the Pits.
If you are struggling with stop placement this is a rule to live by. Don't wait for the market to prove your position wrong! If the position isn't correct get out with a small loss or small gain.
It doesn't matter whether you are day trading, swing trading or position trading this rule will help you keep your loses minimal. I always have a hard stop in as a backup (more of an emergency stop) and would only not constitute a significant loss if the market runs against me.
noise is a good thing, forex has less noise and trends well, but that means when you're on the wrong side of the trend and large stop you lose out. In example S&P futures trends less, so when you're on the wrong side it's easy to correct your losses