usually all you have to do is make the comp duration longer in composition settings and drag layer to right.
if you use pixel time stretch, precomp it then add timestretch to the precomp, you can then make the precomp long enough for the effect to run all the way through.
* To cycle through Timecode Base, Frames, and Feet + Frames, Ctrl-click (Windows) or Command-click (Mac OS) the current-time display at the bottom of the Composition, Layer, or Footage panel, or at the top of the Timeline panel.
* To change time display units, choose File > Project Settings, and choose from the options in the Display Style section.