What goes up must come down , that price movements in one direction are always followed by retracement in the opposite direction.
Ofc, not all movements will follow the same pullbacks , and these levels should only be used as a guide.
Remember trading is a game of probability, consistency , risk-management and profitability over the long term.
There is no 100% trading strategy can make you always win.
My strategy for bitcoin now is buy under $ 350 and Hodl for long term profit.

Cheers and Peace