Xela, this might sound pretty funny but believe it or not the MACD does have a powerfull magical predictive properties, lets say accuerate instead of magical, iam more than happy to show you and prove to you its resilincy, the key with that however is that u cant expect it to work everywhere the key is to know where (which instruments) it works on which constantly changes, although u can change its settings, its easier to change the instruments your trading and maintain original settings because changing its settings can have infinite possible combinations let aside changing the time frames, unless u have a software thats backtesting different macd settings (iam searching to see if there is)
MACD signals picked up the dot com bubble and its top and bottom as well as september eleventh and 2008 top as well as the notorious silver bubble in 2011
And before u jump and point out examples of where it DIDNT work i can tell u that in the times it didnt work it didnt hurt u much overall assuming u trading it systematically, not even in brexit which is the worse drop on the charts for several years(see my post above)