For sure JES. Actually, (as a guess) the correlation should be proportional right? As the inventory levels have rose, we should see in the absence of increased sales, that these 3 classifications should run up as well. In fact they will track inventory very well as long as sales stay flat. If inventory rises and sales decline these classes will continue to ramp up. I think the Inventory/Sold is the most telling ratio.
Note again though that these are lagging indicators. In the thread of the previous post, Powayseller had some very good ideas about the ratios she liked and I agreed with her. I think she will find a good way to utilize these points as well.
The ones I use the most when I am trying to show potential sellers the depth of the market conditions are the ones above, the actives to pending ratio, and the months inventory.