Relative Volatility Index (RVI) custom watch list

Here you go:

input stDevLength = 10;
input averageLength = 14;
input averageType = AverageType.EXPONENTIAL;
def stDevHi = stDev(high, stDevLength);
def stDevLo = stDev(low, stDevLength);
def avgStDevHiUp = MovingAverage(averageType, if high > high[1] then stDevHi else 0, averageLength);
def avgStDevHiDown = MovingAverage(averageType, if high < high[1] then stDevHi else 0, averageLength);
def avgStDevLoUp = MovingAverage(averageType, if low > low[1] then stDevLo else 0, averageLength);
def avgStDevLoDown = MovingAverage(averageType, if low < low[1] then stDevLo else 0, averageLength);
def rviHi = if avgStDevHiUp + avgStDevHiDown == 0 then 50 else 100 * avgStDevHiUp / (avgStDevHiUp + avgStDevHiDown);
def rviLo = if avgStDevLoUp + avgStDevLoDown == 0 then 50 else 100 * avgStDevLoUp / (avgStDevLoUp + avgStDevLoDown);
plot RVI = (rviHi + rviLo) / 2;
AssignBackgroundColor(if RVI > 55 then Color.RED else if RVI < 45 then Color.GREEN else Color.BLACK);

Everything here is copied directly from the built in indicator that comes with thinkorswim. The only thing I added is the last statement, which assigns the background color of each cell in the watchlist column. Screenshot shows the result.

You are the best, I will test this now. Be expecting a donation.