Hi everyone,

A few weeks ago I discovered the Fractal Dimension Index in the Prorealcode library and got very interested in it.

I did some research and found out that John Ehlers did his own version called the Fractal Dimension (with more smoothing and filtering).

I decided to give it a try and started to code his version of the indicator. See the Easylanguage code here (bottom of page)  :

http://traders.com/Documentation/FEEDbk_docs/2010/06/TradersTips.html

I ended up with the below version. However I found it not to be very well working.  I lags a lot, wrongly filters range and trending markets. Which is a bit surprising with Ehlers work. I reviewed the code and didn’t manage to find errors (but I’m still a beginner in programming).

To all the experienced programmers : Can you please check the below code and tell me where I did wrong ?

Many thanks !

N = 30

Price = ((High + Low) / 2)

Smooth = (Price + 2*Price[1] + 2*Price[2] + Price[3]) / 6

N3 = (Highest[N](Smooth) - Lowest[N](Smooth)) / N

HH = Smooth

LL = Smooth

For Count = 0 To ((N/2) -1) Do
IF Smooth[Count] > HH THEN
HH = Smooth[Count]
ENDIF
IF Smooth[Count] < LL THEN
LL = Smooth[Count]
ENDIF
NEXT


N1 = (HH - LL) / (N/2)
HH = Smooth[N/2]
LL = Smooth[N/2]

For Count = (N/2) To (N-1) Do
IF Smooth[Count] > HH Then
HH = Smooth[Count]
ENDIF
IF Smooth[Count] < LL THEN
LL = Smooth[Count]
ENDIF
NEXT

N2 = (HH - LL) / (N/2)

IF N1 > 0 AND N2>0 AND N3>0 THEN
Ratio = 0.5 * ((LOG(N1+N2) - LOG(N3)) / LOG(2) + Dimen[1])

Dimen = Average[20](Ratio)
ENDIF


RETURN Dimen as "fractal dimension", 1.4 as "1.4 level", 1.6 as "1.6 level"