Dear Blusea,
Odin TWS ( Odin Trader Workstation) is a software for Sub Broker. So If you are a investor and having a Trading Account, you will ask you Sub broker for buying or selling stock, your sub broker will trade for you by using Odin TWS Client.
If you have computer with internet connection, you can ask your sub broker to provide you odin diet software, by using odin diet software you can trade in your account