Looking at the thread openers post, it is correct in a reductionist sense that there is only price. So the only thing to follow is the price, when you trade.
1. You can solely follow price in its formations (but necessarily in a chart configuration, such as 1min, 5min, etc)
2. You can look at indicators which offer you prisms of price through which you can indirectly follow the price.
3. You can follow price adding live channel lines to use as a perceptual guide to BO's (change of direction)
4. You can follow volume which is a function of price. Price can exist without volume (eg an ask and bid price untraded). Volume cannot exist without price (volume is price/prices traded).
But sophisticated and highly accurate trading does require more than price in a sole and only capacity as a live changing number. In particular I refer to connected sequential trading wherein you are buying the upmoves and selling the downmoves as they follow each other (CL, YM, ES, etc), open to market close.
Expertly using channel lines and certain aspects of volume in certain chart configurations, turns you into a lethal money making machine.

1. You can solely follow price in its formations (but necessarily in a chart configuration, such as 1min, 5min, etc)
2. You can look at indicators which offer you prisms of price through which you can indirectly follow the price.
3. You can follow price adding live channel lines to use as a perceptual guide to BO's (change of direction)
4. You can follow volume which is a function of price. Price can exist without volume (eg an ask and bid price untraded). Volume cannot exist without price (volume is price/prices traded).
But sophisticated and highly accurate trading does require more than price in a sole and only capacity as a live changing number. In particular I refer to connected sequential trading wherein you are buying the upmoves and selling the downmoves as they follow each other (CL, YM, ES, etc), open to market close.
Expertly using channel lines and certain aspects of volume in certain chart configurations, turns you into a lethal money making machine.

One, I don't care, and two, that's not the topic of discussion here. I thank you in advance for acting accordingly.