This is just a guess which will need more evidence to verify but it looks to me like this wave 4 is a double sideways correction. It would be labeled WXY. It would be a zig zag followed by the X wave and that followed by a triangle. The triangle has only today's decline to be complete.
So labeling the correction it would be down to W up to X and down to A, up to B, down to C, up to D, down to E of Y today.
just in case anyone is confused...P.S. posts this to make it more confusinghehe