I'm confused by this as well.
Here's the excerpt from Andrew's book (great read BTW):
"If the current price of the stock is higher than the previous day close (for Stocks in Play that gapped up), the market is moving from a Green day to a Red day (meaning that the percentage that the price has changed will now be negative, which will be shown as red in most of the Exchanges and platforms). This is a Green-to-Red move."
The reason this doesn't make sense is the price in this excerpt is currently above the previous day's close,. Given we've gapped up we must be above yesterday's open, and ergo the price is up. Why would the percentage that the price has changed be negative? Nothing is mentioned about the open of the day when the gap occurs. We are above yesterday's close - shouldn't that be positive? And when we are up - are we not green?
If this said the price is below yesterday's close, and yesterday was green, and we're below the open, so the day candle is red this makes sense.
