Bob has uses a colour coding system to indicate trouble. Trouble comes in various forms, so I think has made an attempt to amalgamate them. Read his instructions. To be honest I don't fully understand it. e.g. I don't know what the green negative means. I think we can assume that Red is not good! Isolated frequencies or groups or clusters of adjacent modes are obviously dangerous. Axial are usually much stronger then the others. There is a more pictorial mode calculator which I found helpful. It shows trouble and it's locations visually.
hunecke.de | Room Eigenmodes Calculator Unless you are prepared to go all the way I wouldn't bother with any of this stuff. Treat your room in the basic standard manner. Corner traps, RFZ and so on. Ethan and Glenn's sites have this. If you have Fuzz or REW, tweak your final positions by measurement and comparison. Don't forget the height.
DD