That works. Or, one could merely describe the relationship by saying that the bear graph is the bull rotated 90 degrees CW, with the color changed from green to red. It's a very open question. I should have probably used the word 'describe' which is less limiting than 'quantify'...
IMHO, one of Neke's problems is that his journal is interactive. As a result, he is consulted by dozens of 'experts' during a time when he should be retreating to his 'den' & refining HIS strategies (not the strategies of others).
Opinions are like assholes. Everybody has one & they all stink.