Too bad he's a narrow-minded person who think the only bars in the universe are time-based bars. Let's see him try it on Renkos. And for that matter, you also, padu. HA HA!
In price action trading, traders make decisions about trades based on price movements rather than on indicators derived from technical analysis. In simpler terms, traders follow the movement of prices and trade accordingly.
A trader uses price action to analyse the movement of prices. It generated a signal when to enter and exit a trade. Short term traders mostly use it for quick profits.
If there is such a thing as "the holy grail of trading the markets", it's in understanding "Price Technical Analysis". Anybody who claims otherwise doesn't know what he's talking about.
An example of Price action trading... You see three strong bars all closing on or near there highs and nothing to the left of the chart. Price is breaking out and likely to go higher even if it pulls back. Hit the Buy button.