UAE Trading Company?

I´ve read this :

Business in RAK - Living in Dubai

A clever way to start a relatively low cost business is to set up an onshore company in the free zone of Rash al Khaimah or Ajman, obtain an investor/partner visa for the United Arab Emirates, and to reside in Dubai.

under source: https://www.uae-company-service.com/pages/home/business-in-rak--living-in-dubai.php, Site said, it´s possible to get a visa for dubai, if i would setup an onshore company in free trade zone.

Any body know RAK accept companie business = forex trading?

Thanks

Michael