•All Technical Analysis (TA) / Price Action (PA) is derived from price data that has already occurred.
Some folk believes that PA is leading. But (for example) by the time a pin-bar on a 1-hour chart has formed/closed, its extreme price has been left behind -- and even an indicator-based crossover (on a shorter TF) might have given an earlier signal. Perhaps the best chart-based tool you'll found is S&R (or S&D zones, if you prefer).
Now, the reason: it is caused by institutional order flow, that seeks to exploit vagaries in liquidity.
•Is it possible to profit from TA alone? Absolutely YES.
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