In trading how do you know if it is time to still hold or is it the right time to sell? Do you go buy your profit margin  or actually wait for the highest possible peak?
For example if you're earning like 10% of your investment, would you just sell or would you be interested in waiting and seeing if it goes more up so you could earn more, in doing that its possible that it may go down and you then earn like 5-8%
But what is your process in this? How do you go about hold and sell timings?