The inner region of a transient source is cooled down by the inverse Comptonization of soft photons from the Keplerian disk component. The reduction of pressure forces the outer boundary of the Compton cloud, namely, the centrifugal pressure supported shock to move inward slowly in order to satisfy Rankine-Hugoniot conditions. We consider the transient source H1743-322 to study this movement of the shock. The presence of cooling changes the geometry of the Compton cloud gradually. We also see how the flow parameters of this source change day by day during a complete outburst. As the shock-oscillation could also modulate harder X-rays, we want to resolve the question: are QPOs originated from shock oscillations and can the time variation of the QPO frequency be explained by this slow propagation of the shock? For that we solve the Rankine-Hugoniot conditions and derive the condition of shock formation in presence of Compton cooling. We also compute inward velocity of the shock Compton cloud to be a few meters per second, which agrees well with earlier observational results.