Arrows in wrong directions

[Gianni Muntoni]

since a long time exist this problem, as user we learned to work with tihs mistake, but i think after so many versions it is time to fix the problem.

See picture attached arrows goes in the wrong direction, it is not logical.

[Anna Lander]

The first question in such a case is what is your path direction. The arrows suit the path direction, not exactly left-to-right. So, if you draw your line right-to-left, the arrow will direct to the left. 
You can change the path direction using Object > Path > Reverse Path Direction. 

To say something more, we need to know your (exact) Illustrator version and OS.

[Kurt Gold]

That is normal behaviour. It depends on the path direction where the arrow is placed.

You can change the path direction in the Object menu > Path submenu.

Or you can use the little button to the right of the arrow dropdown field in the Stroke palette to invert the arrow.

[SJRiegel]

Those boxes don't indicate left and right; arrow position is determined by the direction in which the line is drawn. 

Here, two strokes drawn staring from opposite sides, with the same arrowhead applied.

[Gianni Muntoni]

I know the arrows suit the path direction, but i think it is logical suit the direcion left - right, cause if you look on a line you can not see in wich direction the line was drawn.

[SJRiegel]

You can't see it, but the program only "knows" start and finish; it does not "see" left and right. After all; if it were working with perceived left and right, what would it then do with a completely vertical line?

[Met1]

Actually, logically, following the direction it is drawn makes more sense, why would you draw a forward facing arrow backwards?

[Gianni Muntoni]

We start thinking i have a line in front of me, not designed myself, or a long times ago,  i can't not know from what side is original drawed.... So if I visually see a botton-arrow that shows the right side and by clicking comes left side... i think it is strange. If tecnically it is not possible to make this better, ok i understand, if possible mahe changes her my Suggestions: vertically: 1 to 179 degrees right side - 181-359 degrees left side,  i suggest 0 degrees right side and 180 degrees left.  If a person has always the same result,  can remember it, actually it is a random lucky game.

[John Mensinger]

actually it is a random lucky game.

While I do understand your frustration with it, the functioning is not random or (un)lucky in any way. The left arrowhead menu applies an arrowhead to the path's origin, and the right menu applies one to its termination. You may not know which end is which until you apply an arrowhead, but if it comes out wrong, you only need one more click (on the Swap button) to correct it.

[Gianni Muntoni]

i see, i agree anyway to your toghts is just a click more