Idea of Currency Exchange Icon
The icon shows two circles, the one at the bottom right overlapping the one at the top left. Inside the top left circle is a C shape with two horizontal lines running through it, the bottom right circle has a dollar sign in it. The bottom left and top right near the circles are two curved arrow pointing to them.
This is a Currency Exchange icon. It is available in PNG and vector. Downloading is free for PNGs up to 100x100px.