The question here is FIFA 19 Coins just how far you can go and disrespect the chemistry. Most people will respect chemistry rigorously but it doesn't necessarily need to be like this. It's true that people do advise you not to use a player with individual chemistry below , but it is contingent on the alternative. Although there's no concrete sign, general rule, a Cristiano Ronaldo playing as ST will perform better than Aduriz, who's most often used for this position on BBVA squads.
If you want to use a player out of his normal position, first you need to check if he has the essential attributes to play in this new place. This adaptation only makes sense if there is a notable quality gap between the best player you can get for the place, in a manner in which the change compensates the chemistry loss. Besides, it's suggested that the ranks have some relation to one another in order that chemistry isn't too roughly influenced.