In Bip44 "Account Discovery" section, there is following sentence:
We scan just the external chains, because internal chains receive only coins that come from the associated external chains. (https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#address-gap-limit)
I do not understand it. If I do not scan internal chain, how will I find the change addresses? Yes, change address will exist in transaction output of public (external) addresses, but I can not find out which output address is change address as it can be real receiver address. Thanks for help.