I think it is like driving in fog. Possible but you are hampering the quality of your trade selection and therefore placing greater emphasis on entry timing and exit timing to skew your r:r higher to compensate for a lower win%
Wrt to indicators, I think they are b0llocks unless you are using them to see where other people may want the trade and you have a strategy which games them or aids you in some way.
Each to their own though. Plenty of ways to skin the cat and trading is a broad church.
I totally agree with you, and I've been taught to trade without using any indicators, and that's the way I trade. I trade only one Fx currency pair, so let me ask you how you would see volume on there.
Best
John