Indicators are good for indicating, in the UK a turn signal on a car is called an indicator - it warns of an impending turn.
But indicators come way down the list of importance in learning to drive, first comes the mechanics of actually driving.
After becoming a good driver you get a sense of the car, you and it are the one thing.
So too with the market, get a sense of how it feels, what is it afraid of right now, is there something that will cause that fear, for example the US govt shut down.
Maybe that shutdown is cracking, maybe the market is relieved, now it can take on some risk and buy stocks come Monday.
So what about FX? - maybe it will sell some JPY in the process buy some USD and then in that process maybe sell some Eur.
The notion of S/R is where the orders are sitting - longer story than one post.