>In Japan, the country where the first emoji sets originated, red is traditionally used to represent increases in the value of a stock.
I don't see it necessary to make a correlation to a stop-light's color coding. You could also argue why anything hot is colored red while cool is supposedly blue.
Well metal becomes red hot, and ice is often blueish in nature.
But it is something we humans do, particularly with signaling devices (which a chart is a form of too, arguably) you will see color used in similar fashions to convey a similar meaning. Red is internationally a STOP color, a danger, warning color, and used as such most everywhere; except the Japanese stock market apparently. Which is fine, just curious to me.
Another comment here said that in the US some traders flip their colors to indicate red=sell, green=buy, which makes more sense to me in terms of Japan.
One of the reasons why red is used internationally for stop lights is because it has the least scattering in the air, which means that it can be seen from further away.
How is this different from Google Express? Google Express has somewhat recently eliminated the need for a subscription and deliver products from many local stores including Costco and Walmart, although admittedly the Walmart selection isn't quite everything I would hope for.