Technical Analysis (TA) has an advantage that it can be used on any asset class with past price trend data. The data that is required is related to price information, i.e. open high, low, close, and volume information.

This analogy can be applied to how to learn and apply technical analysis. Just as driving a vehicle does not require much effort once you learn it, the same goes for TA. 

https://stoxbox.in/marketopedia/technical-analysis/technical-analysis-and-assumptions