How do I find the angle between two points

So I've made a little GPS like system for my program and have AI moving from point to point based on that instead of the actual coordinate system used in the construct 2 editor. How can I find the angle of the line between two points so my bots know which way to go? (the built in angle function leads to my bots getting stuck sometimes)

Edit: I've tried using the atan function but it only works for angles between 90 to 270

set player angle to, (a, b, c, d)

a, b coordinates of first point, and c,d coordinates of the second point

Are the graphics of the bots lined up with the zero angle ?

In C2 that zero angle is to the right. (east)

I can't use angle(a,b,c,d). My GPS doesn't line up with the actual points in the editor so if I use angle it won't be correct. I read that in a lot of programs there's a function called Atan2 but Construct doesn't have it and the graphics are lined up with the 0 degree position

angle(x1,y1, x2,y2) is the same as atan2(y2-y1, x2-x1)

Oh my god, I'm an idiot XD I forgot that when using atan2 you have to do the subtraction to make it into 2 variables, no wonder it wasn't working. Thank you!