TW Golden Indicators for ThinkorSwim

#Indicator Name: TW Golden Indicators
#Version: 1.0.0
#Developer: Melvin C.
#Adapted from tradingwarzone TradingView script
#URL: https://thinkscript101.com/tw-golden-indicators-thinkorswim/
input src = close;
input length = 20;
input mult = 2.0;
input bubbles = yes;
def basis = SimpleMovingAvg(src, length);
def dev = mult * stdev(src, length);
def upper = basis + dev;
def lower = basis - dev;
def inBar = low > low[1] and high < high[1];
def outBar = low < low[1] and high > high[1];
def holyGrail = low[1] < low[2] and high[1] > high[2] and low > low[1] and high < high[1];
plot basis_line = basis;
plot upper_stdv = upper;
plot lower_stdv = lower;
basis_line.SetDefaultColor(Color.light_red);
upper_stdv.SetDefaultColor(Color.Light_green);
lower_stdv.SetDefaultColor(Color.Light_green);
AssignPriceColor(if inBar then color.yellow else if outBar then color.white else if holyGrail then color.cyan else color.current);
AddChartBubble(inBar, if bubbles then high else double.nan, "IB", color.green);
AddChartBubble(outBar, if bubbles then low else double.nan, "OB", color.green);
AddChartBubble(holyGrail, low, "holy", color.green);