I've tried several pump groups and I would like to share with you one that I have best experience with.
Big Pump Signal
https://bigpumpsignal.com/invite-orsycyrfgg
NEXT PUMP SATURDAY 31-Mar-18
PROS
Pumps really work for all! Even with the basic account you'll have enough time to make profit - the peak of the price is usually 10 minutes after the announcement for all!
Unlike other pump groups, they provide professional instructions - there is no useless 'everybody will get lambo' hype talk, but only those information you need to make XXX% profit.
They are monitoring the market and if the market is highly volatile or disturbed pumps are postponed.
CONS
There is not enough pumps
! Usually they publish pumps approximately two times a month.