Thank everyone for your answer.
Just to know: delta or blackfolio show the price from a specific, chosen exchange or from coinmarketcap?
i know what you mean

right now i still can control my self and not check the price too often, but maybe in the future i will do the samething that you do
In Blockfolio you can chose the exchange. but Honestly I am looking for other apps, I believe that the app could be better. i will try Delta which seems to be recommended here.
Also agree on checking prices too often. on one hand it can drive me crazy to check to often,on other hand I can miss good selling opportunities. Is suppose that the best way is to set alarms.