in case aj does not expound in detail i will give a "nutshell" super basic defining of the retrace. Last great bubble was in 1929. From the 1929 high to the final bottom, something like 34-35 months transpired. We are now at nearly 30 months,so if we go with 35 months, the retrace should complete in 5months. But their be variables to this simplicity i am sure. I haven't checked Jeff's lastest charting of how tightly we are holding with the 1929 pattern.Max