What I do is to try avoiding a loss in the first place. Like they say prevention is better than treatment. To prevent loss you can always take use of the stop loss feature. Using the atop loss feature you can automate selling, so that even while you sleep the sudden drops will not affect you as the coin well get sold if it drops below the satoshi rate you have preset. If you are greedy ot may not work, so book profits and dont love your coins.