Yes, it all depends on your expertise. If indeed you are proficient or professional without using indicators, yes, you can be consistent, but when you just go along with people who don't use indicators, without knowing their knowledge, yes, you won't be able to get consistent results. So get used to what you use, it's according to your abilities, if indeed you can't use it without an indicator, you should be able to use an indicator, but when you start learning early without using an indicator, please, no problem.