when you do trading, do you always think about this, "buy some, sell some, hold some."
I am confused with the strategy that you apply, which we usually do buy cheap and sell at expensive price. If what you do buy some, sell some and hold some I make sure you will not get a profit
Yeah this is a little confusing. I think the OP is was trying to tell us something about portfolio management but couldn't explain due to lack of vocabulary or whatever the reason may be. But as far as I know this is a common practice when you have a diversified portfolio. People update portfolio from time to time to earn exclusive profit.