MT4 and almost anyone. What we are talking about here is Gann HiLo Activator..
That is basically a combination of 10sma (high) and 10sma(low) moving average. But you can find the indicator attached here on this thread, and if you read the first 20-30pages, you'll understand what the creator of this thread is talking about.. lot's of examples and applications.. Also another thread to look for is Karmo's thread..
http://www.forexfactory.com/showthread.php?t=43255
Sorry cannot explain a bit more.. NOW, it is a busy trading day.. NFP.. chat later..