This is the combined market breadth tickers: S5TW, S5FI, S5OH, and S5TH representing the percentage of S&P 500 stocks above their 20, 50, 100, and 200 EMA respectively. The colors go from green (20) to red (200) because if 20 crosses above the 200, the market's bullish, and if the 20 crosses below the 200, the market is bearish. So if green is on top = bull market. If red is on top = bear market. In general the market sentiment is whichever color is highest up.
The background is colored in depending on a few historical extremes in the 200. The darker the color the more significant the buy/sell signal. These can be adjusted by changing the hline's in the code.