Price action describes the characteristics of a security’s price movements. This movement is quite often analyzed with respect to price changes in the recent past. In simple terms, price action is a trading technique that allows a trader to read the market and make subjective trading decisions based on the recent and actual price movements, rather than relying solely on technical indicators.
Since it ignores the fundamental analysis factors and focuses more on recent and past price movement, the price action trading strategy is dependent on technical analysis tools. Something like that, there is plenty of theory in the internet you can read it.