tough

my jumping not good

it is never easy for a beginner. setting a stop loss and profit target is similar to timing the market. you never know what is coming next.
I personally experienced this. i set a stop loss target to prevent myself from losing too much, and sold a portion of my holdings. Next moments, the stock went northward.
i have also sold holdings for profit taking, but only to regret later on if the price continue to rise, and more costly for re-entry.
My thought is that, we can only take the news and the market trends as a form of reference whether the market is volatile and whether we should exit. If not, hold on to the stocks you had chosen if you still have faith in them and feel that their business is still relatable to our day-to-day lives or needs. Buy the dips.
Of cause, if the business belongs to the dying market (ie, company still selling pagers, fax machines etc), please exit.
I am no expert, and not ripping huge profit from the markets. But i am neither making huge losses. Just sharing my thoughts.