How do I know if the competition for a keyword is going make positioning difficult?
We take an average of 12 Search Engines, the "percentage relevancy" is the figure underlined in RED. In this example the top position scores 86%, 5th scores 78%, 10th scores 71%. So to get in the TOP 10 for this Keyword you have to score more than 71%.
Getting this tool is explained in the Tutorials.