Some years ago, a wise investor said to me, for the small cost...

Some years ago, a wise investor said to me, for the small cost being brokerage, sell your shares.
Then set out the case to buy the same number of shares in the company. put the plus and minus cases down on a piece of paper.
The ask should I place the order to buy?
In this case I should have pulled the 'sell' trigger some time ago. But I screwed up y original's position sizing. As a result, I have been living in hope. And here we are today, heading into oblivion unless there is a 'changing of the guard at the palace'.
I am selling, the market will not give credit for and any positive news (if any such news can be generated by the current management) for perhaps two or more years. I should focus my energy elsewhere.