Above is a chart of 2 different uptrends, ASSUME THAT BOTH ARE SAME TIMEFRAMES, which one is stronger to you? And why? What is your definition of a strong trend?
I do have my own definitions that I use to trade, but would be interesting to hear what others have to say.
I'd say the left one is way stronger or "stable", it may have weaker impulses but the number of highs give indication that you could buy now and there would be a high chance it would form another high.
These are just 2 examples, I'm sure there's many many more different types of trends that can be seen from the chart, besides comparing the two, what other types of trends are strong to you?