Look, it's very simple, people that can't prove their ability will always provide reasons why they won't, the one reason that's given 99% of the time is 'it's a proprietary secret'.
This is true. People who can't are in a different domain than those that won't. Confusing the two is inaccurate. I certainly see the value of discernment and advocate for it myself. An inquiring mind makes more progress than one fossilized by skepticism turned into pessimism.
It's a big world out there,... as also within. Revisiting one's basic assumptions can turn many a dead-end into the perfect opportunity to get to the next level. Whatever that level might be.
MACD longer term & very slow setting, short term just price chart.
Yes, interesting settings,...very long-term trading timeframe.