Thanks for the feedback.As far as I'm aware, Elliot waves are not harmonic by themselves, it is a more loosely defined theory of wave structures. Elliot waves have three successively higher tops before two lower bottoms (buy at second bottom), and various compositions and classifications on how this may occur. Some technical analysts seem to believe, the relation between harmonics and Elliot waves is that the X-A segment should correspond to the Elliot impulse phase, and the ABCD part correspond to the Elliot correction. Therefore different harmonic patterns, like the Gartley and the Bat, are different manifestations of the same elliot phenomena.Adding Elliot wave markers to the indicator is of less use, as the some of the patterns themselves are full Elliot waves. One thing I've considered though in a new version is a filtering mechanism which makes it easy to add user defined filters to the pattern finder. It is then quick to add say an "Elliot wave filter" which removes those harmonic patterns where there is no finer-scaled impulse structure in the XA leg. This could be detected for instance by checking if a ZigZag on a lower timeframe has three successive higher tops.Regards
Hi Andre thank you for your reply. Now i'm trying to understand what's the difference between the purist and the holist method to calculate prz and what should I use to have better results.. Could you explain to me in a very simple and practical way what change on the chart ? Also I set both the slack to 0.. Do I have a more precise pattern creation with 0 slack ? Thank you
The discussion on purist vs holist patterns was about
two different views on whether or not an occurring pattern really is
valid. So for example on the Gartley, you know the D point should be
at an 78.6% retracement of X-A and 127% - 161% of B-C. The thing is
that different traders have different rules for validating patterns.
Some might say that the 78.6% X-A retracement point must be within
the 127% - 161% B-C retracement zone, others might claim that either
the 127% or the 161% retracement of B-C should be really close to the
78.6% X-A and the price ideally reverse in between those points, yet
others might think that the price could go below 161% B-C but the bar
should not close there, etc. The “holist” view, which is what is
implemented in the indicator, basically
The “purist” view code-snippet applies a filter
to the patterns found using the holist method by additionally
stipulating that the PRZ must have the precise ratios inside of it by
disregarding slack. So whereas one might holistically say that a
Gartley reversing at 75% X-A and 161% B-C is OK, puristically one
would not because the point where the X-A is at an exact 78.6% is
below the 161% B-C mark. So on the chart this pattern would be
If you set the slack setting to zero all the
ratio-constraints will need to be matched precisely, so yes, this
increases precision and removes non-fitting patterns. Keep in mind
that this might be unrealistic, and the slack setting applies
symmetrically to all ratio-constraints on all patterns with respect
to the leg they are on. If you are code savvy it is possible to
modify this and implement more advanced rules. As is, the way to
“calibrate” the slack is to consider your favorite pattern (e.g.
the Gartley), pick a leg with a single numbered ratio constraint
(e.g. the 78.6% X-A retracement), and find the limit to where you
would consider the pattern as valid if it occurred (e.g. “if the
price reverses at 72% its OK but not at 71%”). Then you have a
slack of 78.6% - 72% = 6.6% and enter “0.066” in the settings.
Do the same for interval ratio-constraints to find a suiting setting
Ok thanks now I've understood what are the differences and can say that I prefer purist view. I have another doubt, e.g. the crab. The point B is a retraicement of XA between 0.382 - 0.618. This means that all of the values between this two ratios are valid or only harmonic ratios, considering the slack, between the min and max (0.382 - 0.618) can be accepted, e.g. 0.382 - 0.5 - 0.618 +- slack ?
I think that second option could be more profitable.. I have read Scott Carney s books and he considers valid patterns only those who have precise ratios to find each point. What do you think about this ?
I think that second option could be more profitable.. I read Scott Carney s books and he considers valid patterns only those who have precise ratios to find each point. What do you think about this ?
I actually thought so too so ran some experiments trying out the different harmonic numbers for the Bat and Gartley on several timeframes and currency pairs. I could not see any notable change in the statistical success rate, i.e., the chance of the ZigZag reversing, so do not think so anymore. Note: the success rate does not take into account the "reward" on the successes which would be dependent on some trailing/take-profit strategy in any case.
What I did find however, was that the reversal chance increased the higher the C-point retracement was, so patterns with a C-point at 0.88 (and even slightly above) tended to reverse more than the others, even those at 0.618 which is a primary harmonic number. This seems reasonable of course since it shows some pressure in the trade-direction.
I've also looked at Scott Carneys work and in many of the examples he talks about the patterns do not have precise ratios.
thank you now it's all more clear. For curiosity, what success rate did you find with you experiments ?
It depends on the market and pattern, some pairs seem to like a pattern very well while other pairs doesn't. It can be anything from 40 up to 90 %, with about 70% success rate being rather normal. The increase with higher C-point was like the difference between 60-ish% to 70-80-ish%.
So just ran the pattern finder again on GBPCAD daily. In my source I've changed the Gartley 113 definition into finding 0.88 C-point Gartleys exclusively. The statistics which are shown in the screenshot tells that 3 out of 4 times the Gartley 113 reversed (75%), while both the standard and Max Gartley have 50% success rate.
This was how my "experiments" were done, did not take notes or anything but remember this conclusion and seeing it also happen with the Bat.
What movement from point D do you consider a reversal ? Do you consider a specific ratio to reach ?