You need to sync the Metastock database with the Data Director database

When there is a new stock listing or name change  you need to manually sync the two databases from Metastock 16 and 17.  Metastock 15 has a different process. Data Director already has the changes so you need to sync the two database. Follow these notes what to do.

https://paritech.weblink.com.au/knowledge-base/metastock-missing-stocks-from-the-power-console-how-do-i-add-newly-listed-stock-to-my-local-data-list/

The second reason is that Metastock does not display stocks that have not traded – that is when the volume is 0.