indicator of Demark record the areas of price exhaustion, which usually coincide with price peaks and troughs. The indicator ranges from 0 to 1. When the indicator falls below 0.3, the expected price reversal up. When the indicator index rises above 0.7, the expected price reversal down.
As I've said about many other indicators about this I can say the same thing: I do not know of any successful trader who would use this indicator.