Blend AI enemy animation - cant find velocity

Hi guys! So I have an enemy AI that spawns from various points and follows a way point system. What I am trying to do is capture the movement direction into a variable and say basically if currPos.x or .y is +1 or -1 then apply it to a float in my blend tree.

https://pastebin.pl/view/6ca3d428

I tried originally without a blend tree, using bools but I still cant figure out how to capture into a variable which way something is going. I was able to capture a transform.position.x but that was just monitoring its actual position in xyz on the screen and not a velocity of foward or backwards.