Doge has a consistent 8.2 month cycle. The lone exception is a failed/mini pump, otherwise it's like clockwork.
Above chart is based on the first day of each round of pump cycles. The average of these 6 data points is 245 days.
This puts the next cycle at: last week of April / first week of May 2019.
I can't speak to how high or how low - but I do know that by April 1st you should have made any entries you plan on for that cycle, just in case it triggers early.
Then ride it out until you get a nosebleed!