How to keep profits from currency speculation?

When buying a currency, if you make more than 10% after buying it, then we will start to implement the principle of principal protection (if it later drops to the buying price, sell immediately and unconditionally). If you make about 20%, then It is stipulated that this transaction must make at least 10% before selling. In order to maximize the profit, when making 20%, it is stipulated that the profit will not drop to only 10% and not sell, unless one has the skills and is very sure. The sex is high, otherwise it won’t be sold.

In the same way, if you earn 30%, you will have to sell unconditionally if the profit drops to 15%. This principle is that there is no technical judgment on the high point, and let the profit retracement help you roll in profits.