In here we can say it starts in line 6 and continues in line 1, so whatever happens to line6 we can also see continue to line 1?However, I don't think it works everytime, did you mean that?
No. "Linked" line theory has its own particular rules. Your example will not satisfy the conditions suggested to have them "linked".
The theory proposes, that a line that transforms into a line that is next to the original line it transforms from, may be linked, but only in parituclar questions.
The reasoning for this, is because under certain questions' circumstances, the lines will represent each other as they are so close to the source (the originating point) to which the lines move from; usually in this case yourself, or the focus. And from there, the continuing movement will show what the final resulting outcome will be after successive changes have transpired.
So the following will work:
_ _ yo
_ _ h x
_ _ c x
_ _ ch
_ _ y
___ t
The question being about what this other person can help your legal matter as a witness. Since the object is c (chou) Earth, and it transforms into h (hai) Water, and the line directly above it is also a h (hai) Water that is moving, the theory suggests that this other person will initially cause a lot more trouble for you instead. This is because h (hai) Water, supports and combines with the y (yin) Wood on line two that is representing your legal issue.
However, because this line is not finished (according to this theory), a further change, shown by the fifth lines h (hai) Water moving and transforming into yo (you) Metal, suggests that after a further event, this particular witness, will provide a way for you to break free of the legal matter that is causing you so much grief.
This is just a fairly basic example of the "linked" idea in WWG, but the key thing people need to know, is that it is not applicable for all sorts of questions to the I Ching. Certain questions can never show a "linked" setup, because it is impossible for the Hexagram to show a "linked" outcome, whilst at the same time showing something completely opposite when the original question calls for it during an interpreation of a reading.
An example of this:
I suspect that I may be being framed for something bad that has happened at work by this person.
Object moving in this case, combining with the Self, would indicate that the person this question was based on, is not the one framing them. As this line is in support of the Self line, whilst the line it transforms into supports and combines with the second line; y (yin) Wood that represents work.
The fifth line moving and turning into yo (you) Metal, would indicate that someone who appears to be helping you, is actually the one backstabbing you instead.
As you can see, the question asked will impact on usage, and is not a see it happen, see it everywhere type of rule.
So we have line 1&3 and lines 4&6, but when will it activate?Does it need the last line, or it can be with only these 2, and do they have to be moving/active etc. or it always is there if they are present?Also can the third part be any other line, active or not?
If lines 1 and 3 are moving, and they transform into the line they need for the 3 way combination to happen, then there is nothing more needed to make it happen. It simply is. Same applies to lines 4 and 6.
So for example:
___ y x
_ _ t
_ _ sh x
___ s
_ _ w
_ _ ch
Lines 4 and 6 will transform into w (wu) Fire on line 4, and sh (Xu) Earth on line 6. These lines are all part of the "change" shown through the moving lines in the Hexagram, and hence have their own invevitability about them and their arrival. Since they all contain the 3 way combination parts already, lines 4 and 6, doesn't need a w (wu) Fire line to also appear elsewhere to make this 3 way combination happen.
As for the rest of the basic rules for 3 way combinations, I'm sure someone else can chime in regarding them.
