Gangho, you right the price of Eratat seems to move in cycle over the last 3 yrs. The 3 yrs cycles indicated below:
It peaks on 10/1/2011 @ 26.5 cts and goes down hill to 10.2 cts on 26/12/2011.
Next peaks on 15/2/2012 @ 15.7 cts and goes down hill to 7.6 cts.
It peaks again on 22/2/2013 @ 15.8 cts and goes down hill to 8.7 cts on 15/10/2013
Yesterday it has rises to 11.2 cts, about 5 millions shares traded which is only about $0.5 million. Last weak on its way up the amount is about 2 to 3 hundred thousand dollars only. From what I see this stock is very easily manipulated. It looks like history will repeat itself. Eratat is one of the penny stock in play now.