I found a page that helps you to manually analyze the strength of the competition for any keyword.
I don't like the "Domain authority" part. when I type any long tail keyword in google, I always find high authority domains even if they are not optimized well (the exact keyword is not mentioned in the meta title or the URL at all).
I can get amazing scores for many long tail keywords I find in google keyword planner. The keyword is mentioned from 3 to 4 times in meta title at the top 10 websites.The keyword in URL is just mentioned 1-2 times.PR for most pages at top 10 websites are from 0 to 2. Referring domains scores to the ranking pages are less than 30.
The only exception is the "Home Page PR". I cannot get good score for this part. I always find lots of high authority domains for every keyword I choose. Please tell me how to get around this? Or do you think the domain authority is not always important.Thanks.