Gann

Armstrong cycle 8.6 yr = Pi cycle, 8.6x365.4 = 3142.4 days,
Lucky 13, 13 yrs (Fib no) = 13x365.4 = 4750 days.
And 3142x1.5 =4710 days.
..........and 2000 March to 2013 March =13 yrs, (Pi cycle & 13 yr Square)
Yam, thanks for your hint the Pi cycle in HSI

it is 159 months since 2000/3/23 tech stock burst,
and the price at 1597 top on April, 2013......hehhehe.....Gann month,
Only have 2 more trading days for April, are you ready?????