GMN, the data seems to be of a 19 year cycle with pattern superimposed on it. It appears to suggest that 2014 is a sell (panic) followed by a buy (low prices) in 2015. A medium "panic" may be due in 2018, and the next "PANIC" would seem to be due in 2023.
Hurst cyclic theory is similar, in that it contains a 19yr cycle, 8.5 and 4.3 yr cycles, which seem to correspond to Gann patterns.
Oddlot