Hi Prateek. Before i answer your question try to understand the mechanism of prices. Prices keep moving in and out of equilibrium and try to find equilibrium at a level where there is agreement on price and disagreement on value.
A mark down phase conveys one simple and straight forward message that the trend of the market is down. This basically means that supply is greater than demand. So now the market is aiming to find equilibrium.
A dead cat bounce basically means weak up bars moving back into an area where supply was seen before. The attached chart just shows one of the forms of a feeble rally. There are several other variations , some which can be easily spotted by the naked eye while some which would entangle the decision making process.
Hope This Helps
Cheers
Happy Trading