this is basically this I was told that I have to constantly sell my stock then reinvest it to "lock in" profits. Is this true? thread again but for pies. So here the short answer for you:
How to sell stock from pie: export it (right button here found at the bottom of the holdings tab of the pie)
After exporting it you can just sell it.
Selling and rebuying immediately:
I just don’t see why you would want to do this aside from possible tax reasons, you’re just realizing your profits. If you have $600 worth of tsla, on the original investment of 400, then you could sell $600 worth of tsla and rebuy. The effect would be a taxable event (depending on country and tax laws) + spread costs resulting in ~$600 worth of tsla.
There is no magic thing that happens if you sell and rebuy you just realized your profits and nogthing else, you have the same amount of money invested in tsla before and after rebuying (maybe even a bit less due to spreads but with tsla those are negligible probably)