It's not the job, it's the resolution. You can daytrade easily on any processor integrated gpu. With 1 monitor. When you start getting to 3-4 monitors you start needing a card that is powerful enough to handle the increased amount of real estate. Little cards don't do as well and can he limited to 3 monitors. 1440p makes that even harder.
7680x4320 is the maximum resolution capable on that 2070 Super. That monitor is 5120x1440 and is identical to 2x 1440p monitors, so for 4x monitors you'd be looking at a screen resolution of 10,240 x 1440. Even that card will struggle, if it's even possible.