How to use touch swipe to shoot an object? And how do I use two cameras at the same time?

Hi,

In UE4 I have made a sphere which I want to shoot. To shoot it you first have to pull your finger a bit back (the sphere won’t move with your finger) so you can see an arrow which points in the direction you are shooting. And to shoot it you have to swipe it forward (then the sphere shoots away in that direction). The bit of pulling it back first and seeing the arrow is already done. But I don’t know how I can make it in blueprints so that I can calculate the speed you swiped with.

Here is my piece of the pulling back: Screenshot - bd7ed25958342086399a636662c5afdb - Gyazo

The second thing I want to ask is: How can I show 2 screen of 2 different cameras at the same time (like splitscreen)?