You can cycle nCache clips to repeat the simulations contained within the cache clips. You can create cycles before or after a cache clip, and they can be whole or partial cycles.
The end of the original nCache clip, and the beginning of the first cycle, is marked by a small vertical line. The end of each cycle sequence for a nCache clip is marked by a small cycle tick or marker.
Cycles are represented by the letter C and appear a lighter blue than the rest of the cache clip.
To cycle nCache clips
- In the scene view, select the object whose cache clip you want to cycle.
- In the Trax Editor, select List > Load Selected Characters.
All the current object’s caches appear as clips in the track view.
- Select the nCache clip you want to cycle.
- Do one of the following:
-drag the lower corner clip hotspots of your nCache clip to create a cycle before (pre-cycle) or after (post-cycle) the cache clip. 
- In the Channel Box, set the Pre Cycle channel value to create a cycle before your nCache clip, or set the Post Cycle channel value to create a cycle after your nCache clip.
See Pre Cycle/Post Cycle.
To edit the number of cycles for an nCache clip
- In the Trax Editor, double-
the number beside the C on the cycled part of your nCache clip, type a new number for how many times the clip is cycled before (Pre Cycle) or after (Post Cycle) the main cache clip, and then press 
. 
For example, if the cycled part of your nCache clip appears after the main cache clip and its number of cycles is 2, then the simulation in the main cache clip is repeated twice after the main part of the cache clip.