Digital Currency Trading Profit and Loss

As everyone knows that trading is a digital currency profit and loss, the profit may be abundant, average or weak, and the loss can be heavy, medium or weak. So how can you avoid a huge loss while keeping your chances of profit open? The solution is to stop the loss or determine the loss ratio stop limit. How do you work with this mechanism? You know you bought the bnb at $ 20 and the selling goal is $ 30 since the news is positive, but since the market is full of surprises the price can drop suddenly even though it reached $ 25.49 but did not complete your goal and may take a long time and several corrections until it reaches 30 $. Since you purchased the $ 20 price of $ 100 bnb or $ 2000 you can put the SL as follows: STOP 18.1 LIMIT 18.00 The loss ratio is 10% if the price drops to 18.1 at the rate of $ 2 per bnb, but in the same keep the open positions in the price return to rise without going down to the point of the surface.