A 4 bar datnoid is a subset of an Indonesian datnoid. An Indonesian datnoid can also be 3 bar or forkbar.
3 bar datnoids are far more expensive compared to a 4 bar because their patterns are more pronounced and nicer looking.
an unstable datnoid is usually discoloured and darker in colour with its bars not as pronounced a go for a lower price. Datnoids can either be stable or unstable depending on their settings, doesn’t matter how many bars it has on its body