Er, no. There still a square of blocking terrain between them, and Juggernaut can't reach out and hit Magneto from 2 squares away. Also, moving back and forth wouldn't be movement in a straight path. A straight path would be like this: --->
Moving back and forth, the path would be this: --><--
That's not a continuous straight path.
Nothing in his text says that he stops ignoring walls/blocking terrain when he stops moving. It says "he ignores all terrain except elevated terrain for that action." The close combat action from charge is still part of the power action that was given before he started moving, so the walls would still be ignored.

how about his...

xxxJxxx
-------
xxxMxxx


Now since theres a wall there, juggernaut and magneto isn't adjacent yet.

Using juggernaut's power, would a 0 movement charge be considered a vertical/horizontal line? and thus ignoring the wall allowing juggernaut to hit magneto?

Also would juggernaut be able to charge to the left or right, 1 space, thus activating his power, ignores the wall and hit magneto.

no to the first because he didnt actually move and yes to the second

I am very interested in the answer to this question.

My bad, I didn't realize it had to be in a straight path.

I had the same idea a little bit ago, and posted this very question to the deputy cave. My take on it is that 0 movement would not be in ANY direction, and would therefore not quality as a straight horizontal path. If the feedback from the other deps is that it should be ruled otherwise, I'll post here to clarify.

Yep.

Actually, moving 0 squares is movement. For example, see the clarification on page 4 of the player's guide. However, I do think that the answer is no, because it's not movement in a straight horizontal or vertical path.

My mind is blown by this thread.

So NOTHING STOPS THE JUGGERNAUT except:

1.) There is a baby eating ice cream and he wants it.
2.) Vlad is leaning against the wall in the Dep Cave and thus making the action invalid.
3.) Magneto is in the bathroom, but he can hit him from the next stall.

That should be easy to remember.

Juggernaught punches his fist through the wall to hit the opponent. the wall is only destroyed if he runs through it. a fist sized hole doesn't take down the wall

More aptly, don't let plausibility get in the way of game mechanics (especially when half the characters defy physics by flying).

Flying doesnt defy physics!

Wait, what? Using this ruling, Juggernaut would not be able to move down this path to X?

---M-----
J---------X

If he were to sidestep or do the pee-pee dance he could.

Juggernaut stops cause he here's someone eating a donut on the other side.

That seems to be correct, rowdyoctopus.
Juggs has a trait that he breaks away automatically, that doesn't mean he ignores characters on movement though, right?