Most of the indicators for forex trading can predict the market movement, accurately on it's historical value and not it current action. Can any forex indicator predict market movement accurately?
Logically It's not possible to predict the price , at least nothing accurate as you are asking otherwise everyone would be rich by now. (this is valid for both fiat and crypto currencies)
You got it right. No one can precisely say this is what the price is going to be and what profit you going to make. Even the computer programs that were developed to make some prediction on this kind of thing cannot in any way precisely say how it going to be, everything is just based on assumption.Try to be current on the latest happenings regarding currency you are trading and you will be in good position to make the right decision.