The divergence is much clearer when there's more price action. OMH is less obvious and 'sharp' but is still quite clear if you're looking for it.
Time frame is not a key component. Below is the daily chart of APT.
Check out my original TA call of $28.50 in the Short Term Traders thread here:
https://hotcopper.com.au/threads/short-term-trading-week-starting-14-oct.5007909/?post_id=40913291
The Negative Divergence here is more suble, because it happens in a much sorter time frame, but it's unedeniably negatively diverged because the MACD creates a lower high while the share price creates a higher high as the arrows demonstrate.
As for your question regarding the broadening gap within the MACD itself, I pay no attention to that. The only thing that matters to me is that the MACD itself is diverging from what the share price is doing. The yellow box your circled is not something I'd ever bothing looking at. It may be significant to other TA but not in mine.
