So did any number of other oscillator/ma type indicators. They also gave just as many false signals. Play with the parameters and you can find what you believe to be true....
there are many number of oscillators that work, they key and the work that involved though is of course endless to find where it best works and when and on what? the KEY POINTS iam trying to get across with MACD are two, first one is easy to understand and that is you need to PLAY every hand to get the results that are extracted from back testing when you have found where and when it has worked recently (which could change), the second and the MOST IMPORTANT is the fact MAAANY traders including my past self and even very profitable ones trade instruments without really knowing why,,, even most profitable traders sometimes do that, the question to be posed to any one is why do you trade what you trade??? why do u trade forex? or why do u trade futures?
why is it that you trade whatever you trade, that question is usually met with an arbitrary answer such as, well I know stocks better, or I understand forex better,,,, or iam familiar with or ive been making money in this,,, etc the point is if your purely technical and systematic you shouldn't really care what's being traded what you should be after is what best to trade based on back tested results whether that being commodities or currencies or stocks it doesn't matter cuz the end result is that you want to extract profit... this is most difficult to see for those who have been in the business long and profitable than those that are new because the profitable ones are usually content and overlook " where can I be MORE profitable"
As Richard Dennis said, " I can trade without knowing the name of the market" and that's how it should be