Corp question (Golden Rainbow)

In the list of cororations i have there is a colum for Market situation. This has a bar beside each corp, sometimes red,sometimes green.
What is the signifigance of this bar, Need to know what info im looking at. thanks in advance, Tuasman of The Empire of Delrona.

And one more question, in order to raise your Def index, do your defensive weapons have to made into active units or just in storage to rasie it up?

The column shows the surplus/demand. Green is surplus, meaning there is extra goods. Red means demand which is in short supply.

Second question: Yes. They need to be active I think.

Only weapons will raise your defensive/offensive index. Ammunition will not.

They do NOT need to be in a unit/garrison to be raise your index. Just having the units in an active state in storage will raise your index. I believe that if they're deactivated, they'll still raise your index somewhat but to a significantly lesser degree.