How do I make my character change direction?

How do I make my character change direction on any touch like up an down. i have it this way but every time my character hit the wall to fast it change direction to left an right

Providing the actual project could help out answering your question more accurately.

The bit of code you show in your screenshot is just not enough.

Also, it means that when you click your button, the global variable "dir" changes to -1.

All events and actions are read and executed top to bottom.

Changing the value of dir to 1 in this excerpt is irrelevant.

Consider checking the "How do I FAQ" for Construct 2 for questions like those, it does contain a lot of implementations of different mechanics already, including how to set changing the directions of characters.

https://www.construct.net/forum/construct-2/how-do-i-18/how-do-i-frequently-asked-ques-41236

here it is Kyatric.

if the character hit on the wall to many times it change angle to left an right

dropbox.com/s/2sijm0o9am00mfx/Bugg.capx

I can't seem to reproduce or understand your issue.

The file you provide has an object "Player" that will go up and down, bouncing from "wall" and "wall2".

There is no issue of "changing angle to left and right", the movement is perfectly vertical on my computer.

You used the Bullet behavior and configured it to bounce from Solid anyway.

There is not much to do using events there.