"Find" Function

I am a new user and am more familiar with Matlab.
I would like to find indexes of all the values > some threshold in my wave.
Also I would like to be able to count how many values in my wave are greater than the threshold.

What I would like to know how to do is:

Make wave1 = {1,6,10}
I would like to find the index of all the values greater than 5, and have it return the indices 1 and 2

this was all very simple in Matlab, but I am having a hard time finding any simple function that can accomplish this without writing a for loop.

Thanks for any help out there,
Ben