Although it doesn't move in a straight line, I wouldn't say it is too volatile to be worthless. The biggest problem with this indicator is that it subject to revision quite often.Quote from Tsing Tao:
To be fair, that indicator is so volatile it is almost worthless to use for anything.
<img src="http://c3352932.r32.cf0.rackcdn.com/1330442871_0.gif" width="455" height="331">