Is it considered forbidden to allocate the profits from an amount invested in the stock market to one's sister, knowing that one's living expenses are not sufficient and the sister is in need?

Stock exchanges often involve religiously forbidden elements, so a Muslim must verify their dealings before participating. If the exchange does not adhere to Islamic law, it is not permissible to continue engaging with it, and allocating unlawful profits to the poor does not justify persisting in disobedience. However, upon repentance, these profits can be given to a poor sister. If the exchange is compliant with Islamic law, then donating to a poor sister is among the best acts of righteousness.