I have added a new, more detailed code in http://www.elitetrader.com/vb/showthread.php?s=&threadid=81457 The code searches for the optimal Zig change n, from n=3% up to n=10% [you may enlarge this range but for n>10 you will have very few Peaks]. For the last 10 years of the ^NDX, the 31% of the retracement ratios d is 0.50<d<1.00 for n=10%. If you try to narrow the range, only the 19% is between 0.25<d<0.50 for n=9%. More detailed range gives worse results, only the 12% of the retracements is 0.60<d<0.70 for n=10%. Some of them may be considered as 0.618, but is is just the 12% of the total retracements. This is poor and it is impossible to use it in any serious decision making.
no flim-flam fibos on Crude Oil ; ) http://www.elitetrader.com/vb/showthread.php?s=&threadid=51120&perpage=6&pagenumber=1