There are OptionsXpress Ad's right here on the forum. I often abbreviate to Ox so beware!!
They have their own HTML based platform with real time streaming data and charts. They also offer some other platforms. Take a look, I don't mind giving them a compliment but never go "overboard".
I have heard that ThinkorSwim is well respected, but not familiar with them. My fault there, has been on my list to take a look, for longer than I am willing to admit !!!! The "two hands" problem !!