I guess depends what you do, for my stock trading robots I chose Python, just because of some of the financial libraries, (which I didn't use in the end)... it

I guess depends what you do, for my stock trading robots I chose Python, just because of some of the financial libraries, (which I didn't use in the end)... it has a shitty syntax, and any language would do in my case, but I am not a developer so take my advice with a grain of salt: the end result is what matters...