The outside the US part, I think, will greatly narrow your universe of choices. Have you looked into Lime Brokerage? They are now owned by Wedbush but they used to have top tier technology.
Thanks for pointing it out, I looked at Lime, but the pricing is prohibitive for the amount of shares I would be trading. From what I can tell you would be looking at about $2,000 or more in fees per month.
Cheers