There are multiple reasons that cause the waitlist movement of IIM Trichy to slow down. Some include

1.  A high number of buffer calls.
2. The waitlist commitment fee ensures only interested candidates stay in the waitlist.
3. Slower waitlist movement of older IIMs. This is because the Waitlist movement of IIM Trichy or that of any second-generation IIM depends on the waitlist movement of the top IIMs like A,B, l,C, K,L,I. Once their waitlist moves, the candidates vacant the seats from the newer IIMs resulting in their own waitlist movement. 

So all you can do is wait for the top IIMs' waitlist movement.