There are two powerful tools for graphical analysis, combining both price and time.
Andrews pitchfork and spiral. Perhaps there are others. The main question is how to use them correctly.
Forks are relatively easy to build. They are tied to already formed extremes and then do not change their position.
The binding to the three extremes as a triangle of rigidity does not allow distortion of the pitchfork in the future.
The difficulty in choosing the right extremes.
The spiral is also attached to extremes. But to two. To the tops of one wave. On the one hand, it's relatively easy to choose the right anchor points.
One wave has a beginning and an end. On the other hand, it is difficult to choose the correct compression scale for the graph. At different scales, the trajectory of the spiral is slightly different.
For the rigidity of the construction, it is necessary to select the third point.
In the descriptions of the winphi program that Fisher uses, there is a parameter for the spiral that affects the distance between the turns of the spiral.
This leads to the thought - Fisher picked up the scale of the compression of the graph or adjusted the spiral to the chosen scale.
How such a selection to exercise?
The only solution is to select the distance between the turns of the spiral to direct the trajectory of the spiral so that some coil passes through the third known extremum.
As an example, the picture:
The blue spiral is constructed in this way. The first two anchor points are selected in the middle of the descending wave. The trajectory is directed through the highest point of the falling wave - through its beginning.
Undoubtedly, the internal structure of a complex wave is connected with the beginning of this wave. That is, the significant extremes of the internal structure of the wave have a direct connection with the onset of the wave.
Therefore it makes sense as the third point of the "binding" of the spiral to choose the beginning of the highest wave, inside which are the first two points. This is if the construction of the spiral is made somewhere in the middle of the movement. Fisher recommends that you select the first wave or the last wave of the previous movement (or the xABC structure - that is, the correction areas) to bind the start points. With this construction there is no support - there is no third point. You can choose as the third point some significant extremes in the area of ​​the previous wave.
In the example above, the choice of the third point at the beginning of the highest wave directed the trajectory of the spiral and several extremes of the previous motion.
We also observe the interaction of the spiral turns as with Andrews' pitchfork - with Schiff's lines, with RL lines, and with important extremes of previous waves.
We can conclude. Andrews' pitchfork and spiral assume the possession in some degree of art of selecting points of data graphics data binding.
In particular, the pitchfork interacts pretty well with the Elliott wave markup (which is also art). With a spiral a bit simpler. Knowledge of wave counting is not critical.