If this is for middle east only, could people from other countries even join?
Although the target market is the middle-east, the exchange will be open to global participants.
How many crypto currencies does crypto soak support?
"Bitcoin, Ethereum, Litecoin, Ripple, Dash, Zcash and Monero initially", as stated in the whitepaper, and will later be expanded to others. You should read the whitepaper for the entire strategic vision.