We cannot calculate the final dip of the price, because the price fall gets started anywhere as well gets ended anywhere. We cannot make any manipulation, because the price is always moving with correspondence to the ongoing demand and supply variance.
although no one know about that, either the price will increase or decrease and if it is decreasing then how much will it drop but we do trade on speculation and our own speculation.
yeah right its just our own assessment that bring us to buy and to allow our fortune if we assess it right since value is prone to big fluctuation and buying while its in dip is really hard to predict whether it will bounce back or it will go deeper, assuming that you are in a long term investor i think there's no need to worried as long as you will hold for sure it will bounce back.