I asked Ameritrade for a clarification here is there answer:
Thank you for your inquiry regarding the mandatory 1 for 500 reverse stock split from DIGITAL DESCRIPTOR SYSTEMS to ALLIED SECURITY INNOVATIONS COM.
Due to the risks associated with receiving accurate and timely information concerning corporate actions on Pink Sheet and Bulletin Board securities, TDAmeritrade will post the shares once we have received them from the transfer agent. Typically, this will take 2-3 days after the effective date of the corporate actions depending on the transfer agent.
Once we receive the shares, you will see them updated on your positions page. Until we receive the shares, you will be unable to trade the new position.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.