I think Bitcoin trading is different from conventional currency trading like EU-USD and others.
In Bitcoin, you do not need to do anything like that or sell quickly at low prices because it is very harmful. In Bitcoin you can either postpone or keep your coin until the price of the coin rises again, although we can not know when the coin will rise again unless the coin is a coin that is a lot of the community and is a heavily traded coin. You can check the movement of the coin in the forum or if here can be checked on the thread or it could be from the news of the coin.