Speed is ignored for SendInput/Play modes they move the mouse instantaneously (though SetMouseDelay has a mode that applies to SendPlay). A speed of 0 will move the mouse instantly. Otherwise, specify the speed to move the mouse in the range 0 (fastest) to 100 (slowest), which can be an expression. If blank or omitted, the default speed (as set by SetDefaultMouseSpeed or 2 otherwise) will be used. Coordinates are relative to the active window unless CoordMode was used to change that.
The X and Y coordinates to move the mouse to, which can be expressions. MouseMove, X, Y, Speed, Relative Parameters X, Y MouseMove - Syntax & Usage | AutoHotkey v1 MouseMove