Editing Red light

'''Red light''' means '''do not buy'''.  It is presumably
what you see when you [[swipe the barcode]] of a product
whose [[price premium]] plus its [[retail price]] is not
cheap enough to make you buy it.

It assumes that some [[price]] and [[price premium]] data
have been compared, and that there is another option that
is better that can be substituted.

Or, more likely, a total [[boycott]] of that coded product.

A [[yellow light]] is a less strict and more common way to
signal a problem with purchasing a given product.  A [[green light]]
just means "buy".

== How to know when to let the red light glow ==
@@ Line 9: / Line 9: @@
 Or, more likely, a total [[boycott]] of that coded product.
-In this case, it means '''do not buy at any price'''.  But at
-the [[point of purchase]] no one can see that this product is
-''always'' generating red lights everywhere, and for everyone.
 A [[yellow light]] is a less strict and more common way to
-signal a problem with purchasing a given product, or a price
+signal a problem with purchasing a given product.  A [[green light]]
-at which one should buy it (but not for a higher price).
+just means "buy".
-A [[green light]] just means "buy", and like the red can be
-"at any price".  [[KitKat McFlurry]] for instance is red only.
 == How to know when to let the red light glow ==