The Coppock applied to the current market
Consider the chart of the All Ords Index. In about July of 2016 a positive Coppock signal was given (shown below by the green arrow). This indicated that investors should be starting to buy stocks. It is worth looking at charts of the major stocks to note that most stocks started strong positive moves at about that time.
What perhaps makes the July Coppock signal more persuasive is that a Coppock entry signal was evident at about the same time during 2016 for almost every major world index. One of the very few exceptions was the Nasdaq index where because of the very bullish nature of that index, the Coppock failed to move below the zero line.
The recent widespread occurrence of the Coppock signal might suggest that there is a high probability that all world markets will be positive this year. But that is a matter of probability and remains to be seen in this uncertain economic environment.