watch list alerts

are we allowed to add message bar and audio ring alerts to watch lists on TOS? i tried doing it but it seems i got it all wrong. i also  tied added alerts to subgraph TTM squeeze and it turned the subgraph into a yes or no spike indicator but the audio and message bar does alert properly. just indicator just doesnt display like the original TTM squeeze indicator.

code for watchlist:

input price = CLOSE;
input length = 20;
input nK = 1.5;
input nBB = 2.0;
input alertLine = 1.0;

def squeezeHistogram = TTM_Squeeze(price, length, nK, nBB, alertLine).Histogram;

plot hist = if squeezeHistogram>= 0 then
if squeezeHistogram> squeezeHistogram[1] then 2 else 1
else if squeezeHistogram < squeezeHistogram[1] then -2 else -1;

assignBackgroundColor(if squeezeHistogram >= 0 then
if squeezeHistogram > squeezeHistogram[1] then color.CYAN else color.BLUE
else if squeezeHistogram < squeezeHistogram[1] then color.RED else color.YELLOW);

hist.assignvaluecolor(if squeezeHistogram >= 0 then
if squeezeHistogram > squeezeHistogram[1] then color.CYAN else color.BLUE
else if squeezeHistogram < squeezeHistogram[1] then color.RED else color.YELLOW);
def sqzHist = TTM_Squeeze(price, length, nK, nBB, alertLine).Histogram;

declare lower;

#input price = CLOSE;
#input length = 20;
#input nK = 1.5;
#input nBB = 2.0;
#input alertLine = 1.0;

#def sqzHist = TTM_Squeeze(price, length, nK, nBB, alertLine).Histogram;

def cyanToBlue = sqzHist > 0 and sqzHist < sqzHist[1] and sqzHist[1] > sqzHist[2];

def redToYellow = sqzHist <= 0 and sqzHist > sqzHist[1] and sqzHist[1] < sqzHist[2];

Alert(cyanToBlue, “TTM Squeeze Blue Bar”, Alert.BAR, Sound.Ring);
Alert(redToYellow, “TTM Squeeze Yellow Bar”, Alert.BAR, Sound.Ring);

code from TTM squeeze subgraph:

# Source code isn’t available.

declare lower;

input price = CLOSE;
input length = 20;
input nK = 1.5;
input nBB = 2.0;
input alertLine = 1.0;

plot Histogram = Double.NaN;
plot VolComp = Double.NaN;
plot SqueezeAlert = Double.NaN;

def sqzHist = TTM_Squeeze(price, length, nK, nBB, alertLine).Histogram;

def cyanToBlue = sqzHist > 0 and sqzHist < sqzHist[1] and sqzHist[1] > sqzHist[2];

plot redToYellow = sqzHist <= 0 and sqzHist > sqzHist[1] and sqzHist[1] < sqzHist[2];
Alert(cyanToBlue, “TTM Squeeze Blue Bar”, Alert.BAR, Sound.Ring);
Alert(redToYellow, “TTM Squeeze Yellow Bar”, Alert.BAR, Sound.Ring);