based on the 2 previous bubbles.
Only the last 2?
If we are talking about the exact optimal sell point being when the exchange rate is +0.4...+0.45 log points above the exponential trendprice of the date, yes.
(The previous great bubble of 6/2011 became so quickly after the listing of Bitcoin that the exponential trendlines did not yet give reliable signals.)
By the way, as i said on this thread (middle of page 1)
https://bitcointalk.org/index.php?topic=441336.0 , i believe that you should consider a progressive growth of trend and that most models like yours undervalue the price. Which means in my opinion it is even more a time to buy than you think. But i already bought the maximum i could in the 400-450$ area so i can just enjoy the profits and the flawed thinking of Jorge.