We have seen a lot of articles on the Golden Cross on various media.
Let us quickly look at how the Nifty movements have been in the last 10-12 years post Golden Cross.
Conclusion - Its a very late indicator but may sometimes give real long term trend changes. Tough to use it as a decision system. The whipsaws hurt real bad. I would rather prefer looking at price patterns.
This is a quick video. Do put in your comments. Maybe next time would try to put it on Dow Jones/ S&P 500