Anyone here with real experiences about tax residence / moving to another EU country for lower or no capital gain taxes after holding stocks/ETFs a certain period of time ?

So, if you basically move for a longer period of time like more that 5 years in another EU country with a more friendly capital gain taxation , do you need to change your fiscal residence from your native country to the new adoptive country ? I heard that if you move in another EU country, even for a long period of time, the broker is obliged to send the fiscal informations (sales) to your native fiscal jurisdiction which is written in your Identity document, of course if you didn't already chan