Divergences are extremely extremely important and useful. Trick is to learn which ones are going to work and which ones are less likely to. Once you see it, you will be able to recognize it each and every time. Most people think they see divergence, but they don't. You need years of real time practice to see the light.
1. = Only on a very small price move, what will happen because of that divergence and the traders who trade because of that.
2. = Not necessary for good or even big moves, dosent matter, if price is in a major trend or in a direction change process.
Only sometimes, a divergence appears as extra on good or big moves, but they dont give you a clear signal, for bottoms or tops.
They are just patterns in patterns, nothing stands for itsself alone in the charting magic.
If you have a good setup & a divergence extra bonus, it gives you more confirmation that you may be right with going on that trade.