Signal values peaks and noise reduction
A low-pass filter could work for you.

Depending on the application, this could be as primitive as a rectangular filter, where you replace each value by the average of the five values around it, or you could add a weight to individual values.

You could experiment with different filter kernels:


[ .2  .2  .2  .2  .2 ] (equal weight)
[ .1  .2  .4  .2  .1 ] (no negative weights)
[ .2 -.3 1.2 -.3  .2 ] (better peak suppression)
[ .1  .2  .3  .3  .1 ] (asymmetric)


etc.