Predicting whale manipulation is a task that is difficult to be carried out of course if there could be a way out then every trader will be rich by now therefore the best bet is to study technical analysis very well as it will aid and guide a trader on a potential fall or rise in the price in addition to good money management.
It is a difficult task of course but then if you have the determination and willingness to learn it then you can do it. It may not be as perfect as it should be that one can predict the movement of the whales but at least, you would be able to ride some of their movements.
One of the things that I have notice is the change in volume. Once you see that a coin has a volume higher than normal or the volume is building up and the price is still consolidating then expect that there will be a big movement sooner or later.