A cool way to use the "Decoding the Circle of Vths" Chart and the mCircle online software is to reinterpret modes or scales that are a bit foreign to us as some scale or mode we really know.
View mCircle page here
Enter Altered in the Sub-Structure. Altered is found in the database and it says it's a mode of the Melodic Minor Scale.
Enter the Melodic Minor in the Main structure.
Click on the "Load Sub & Find" button on the sub-structure side.
The result:VII (Altered is the 7th Mode of the Melodic Minor).
Another way to reinterpret: If you enter the Altered Scale as the Main Structure and the Melodic Minor as the sub-structure the result is: bII
So one can reinterpret the Altered Scale as Melodic Minor starting on the bII of the Scale
When practicing D Altered one can of it as a Eb Melodic Minor Scale.
Using the "Decoding the Circle of Vths" Chart:
Find the Altered Scale and you will see is the 7th mode of the Melodic Minor