Ok let me help you man.

first it is very easy to predict a pump weeks before it happens becasue in order for a pump to work it must be prepped.

step 1. the group owner buys in and continues to buy small amount of coins to go unnoticed. and buys ans buys and buys. this culd last 1 to 3 weeks or even longer if he wishes.

Step 2.  tell your members what coin will be pumped and what day to pump it, then begin to buy buy buy as unnoticed as possible. (how unnoticed, buying small amonts that will not move a market.

Step 3, the dedicated socialists of the groups begin to pump the coin. in whatever way they can.

Step 4 wait till it hits the ceiling and SELL SELL SELL.

Now in the prep phase the owners have already bought a lot fo the coins, and have them set already in predetermined sale points, along with the coins they have just bought in the pump that actually moves the market. the make a nice profit in their predetermined sale points and the most fo their profit from the pump.

It is not hard to move a market.

now why does he go back to certain coins, very simple, they are popular, they have large movements that would coincide perfectly with a pump. Popular coins or coins that have frequent updates that move its market are great pump and dump opportunities. They are easy to pump because the news is already there and you can push that news to push the market. people are always watching popular coins so when they see a 20 BTC movement on a coin they know its time to get in and hope they didnt miss the train.

I advise you research a bit into P&D and how it works, a lot of your concerns will be answered there. becasue I know the answer to every question yu have up there, and yes it is possible.

and FYI the whole purpose of being a member of a P&D is to have the insiders info. and no I am not part of Ryans group (if he even has one).